Summary The subject of the present work is the analysis of relations between the two most populous countries of the former USSR: the Russian Federation and Ukraine. The main objective is to examine the currently existing dependencies of Ukraine on the Russian Federation. These dependencies define to a large extent the specifics of bilateral relations and influence the policy of Ukrainian state. They are visible in the sphere of bilateral relations, and, what’s important, in different areas of political, economic and social life inside Ukraine. The situation of dependence results in the “penetration” of the dependent state by the dominating power, which is able to control the weaker partner from the inside. The present work consists of eight parts. The first one is devoted to theoretical issues. The study of international relations defines dependence as “the situation of absolutely asymmetrical interdependence” or “a situation in which our condition is determined or significantly influenced by external factors”. The phenomenon of dependence is studied mainly by scholars from the globalist school. The conception of imperialism explains the expansion of states by economic factors or human nature. The dependency school traces the sources of problems of the Global South to the international economic order imposed by the developed countries. An important representative of the globalist school is Immanuel Wallerstein, the author of the world-systems conception, which stipulates that since the 15th century the Western European countries have been developing at the expense of peripheries, in particular Central and Eastern Europe as well as Latin America. The last approach presented here is the postcolonialism. It is not a typical school of international relations. However, it seems a useful tool enabling the analysis of dependence in particular in the sphere of culture. This work proposes a theoretical model of the relation of dependence, based on historical experiences as well as on the assumptions of the research approaches discussed. The framework of this model is used to analyse the relation of dependence in the following six areas: the political system of the dependent country, its economy, security and defence, society, culture, science and religion, and finally foreign policy. The second part of the present work is devoted to the historical roots of Ukraine’s dependence on Russia. At the end of the first millennium A.D. most of the Ukrainian territories as well as the Western Russian lands became part of the Kyivan Rus: the first state of the Eastern Slavs. The Grand Prince Vladimir adopted Christianity from Constantinople, thus placing the Eastern Slavic lands within the sphere of Byzantine (Orthodox) culture. In the 13th and 14th centuries the Western Ruthenian lands were under the Polish and Lithuanian rule, while the Eastern lands – under the Mongolian one. After rejecting the dependence from the Golden Horde, it was the Duchy of Moscow that began to gain increasing significance in the region. Meanwhile, in the Polish-Lithuanian state, the contention between the central authorities and the Cossacks, who exerted political dominance over the Ruthenian lands, escalated. In the 17th century, the dispute turned into an armed conflict, and the Cossacks sought protection from the Russian tsar. This resulted in the outbreak of the Polish-Russian war, which led to the incorporation of the left-bank Ukraine into Russia. After the partitioning of the Polish State the majority of the right-bank Ukraine also became part of the Russian empire. In the second half of the 19th century, writers and political activists from Ukraine came to the fore, voicing ideas about the distinctiveness of the Ukrainian and the Russian nations. However, their activities were repressed by the tsarist authorities. It was the First World War and the revolution in Russia that brought new possibilities. In 1917 the creation of Ukrainian People’s Republic was proclaimed. However, the state turned out to be short-lived and in 1921 most of the Ukrainian lands came under the Bolshevik rule. The Soviet authorities, unlike the tsarist Russia, acknowledged the existence of the Ukrainian nation. The Ukrainian Soviet Socialist Republic became one of the founding states of the USSR (in 1922). Ukrainian education was introduced and limited development of Ukrainian culture was made possible. The economic policy of the Soviet authorities resulted in the modernisation and industrialisation of the country, but, in the long run, turned out ineffective. Collectivisation and the repressive policy towards the Ukrainian peasantry contributed to the Great Famine of 1932-1933. In the 1940s, most of the Ukrainian lands were united within the borders of the USSR, but it was at the expense of persecution of the opponents of the new regime and attempts to eradicate the culture of Western Ukraine. The symbol of this ineffective and thoughtless policy was the nuclear disaster in Chernobyl (1986), which significantly contributed to the intensification of independence movements in Ukraine. The subsequent six parts discuss the contemporary dependencies of Ukraine on the Russian Federation with relation to the political system, economy, security and defence, society, culture, science and religion, and foreign policy. The dependence of the Ukrainian political system on Russia stems from the lack of a longer state tradition in Ukraine, the political and economic benefits that political decision-makers derive from the co-operation with the Russian Federation, as well as other types of dependencies which in some way force Ukraine to co-operate with the Russian neighbour. The existence of the aforementioned dependencies can be confirmed by the evolution of the Ukrainian political system over the last twenty years, as well as by the actions of the main political actors in Ukraine. The political systems of Ukraine and Russia underwent a similar evolution after 1991: from a mixed presidential-parliamentary system which led to conflicts between the legislative and the executive powers, to the new constitution which introduced a presidential system, progressing authoritarianism and oligarchy. The evolution of the political system was faster in Russia than in Ukraine, which suggests that the Russian Federation served, at least partially, as a model for its Ukrainian neighbour. In 2005, after “the Orange Revolution”, Ukraine began to develop politically in a different manner than Russia, but after the 2010 presidential election it returned to the authoritarian model of governance. Two out of four presidents of Ukraine, Leonid Kuchma and Victor Yanukovych, conducted a policy that can be described as pro-Russian. Moreover, the majority of parties in the Ukrainian parliament, in particular the Party of Regions, which dominates the Ukrainian political scene, favour close co-operation with Russia. Most Ukrainian oligarchs, who play an important part in the political and economic life of the country, also attach significant importance to co-operation with Russia. The Russian Federation is not a passive observer of the Ukrainian political life, but, using instruments at its disposal, it repeatedly supported pro-Russian political forces, seeking to weaken their opponents. The best known display of this policy was the involvement of Russia in the election campaign in Ukraine before the presidential election of 2004. The economic dependence stems from the centralised character of the Soviet economy and the lack of a consistent reform policy in Ukraine after 1991, which could have led to the elimination of links existing between Ukraine and the Russian Federation. The most visible manifestation of Ukraine’s economic dependence on Russia is energy dependence. Ukraine’s economy is energy-intensive, which forces Ukraine to import energy resources (mainly gas) from Russia, or via Russia from Central Asia. An important advantage which makes it difficult for Russia to exploit the situation is the fact that Ukraine is a transit country for most of the Russian gas exported to the European Union. Therefore, Russia is seeking to become independent from the Ukrainian middleman. The commercial dependence also plays an important part. Russia is Ukraine’s biggest commercial partner, and some branches of Ukrainian economy (for example agri-food industry) depend to a large extent on the Russian market. Finally, the Russian Federation is an important investor in Ukraine. Official data suggests that Russian investment is significantly smaller than that of the European Union countries. One can suspect, however, that this data does not reflect the reality. A significant part of Russian investment is made covertly, for example via tax havens. As a result, Russia controls a significant part of the Ukrainian economy. The security and defence dependencies are a result of common membership of Russia and Ukraine in the USSR, as well as the asymmetry in the military potential of both countries. In the last 20 years, the following issues were of particular importance: the post-Soviet nuclear weapons located in Ukraine, the Russian Black Sea Fleet, the Ukraine-Russia border, the industrial and military cooperation between the two countries and the conflict in Transnistria. After 1991, pressure from Russia and the Western states notwithstanding, Ukraine delayed the transfer of the post-Soviet nuclear weapons to the Russian Federation, which had a significant negative impact on the image of Ukraine in the West. 1994 saw the signing of agreements, in which Ukraine committed to returning post-Soviet nuclear weapons to Russia in return for limited warranties from the Western powers and the Russian Federation, as well as financial aid. Only in 1997 Russia and Ukraine reached accord regarding the division of the post-Soviet Black Sea Fleet. The Ukrainian authorities agreed to further stationing of the Russian part of the fleet in Ukraine; initially until 2017, and then until at least 2042. Also in 1997 both countries confirmed the Ukraine-Russia border; however, the process of delimitation and demarcation has not been completed to this date, due to Russia’s reluctance to such a solution. Military co-operation seems justified from the economic point of view due to the existence of an enormous defence industry in both countries since the Soviet times. From a political perspective, however, this co-operation hinders the development of other partnerships by Ukraine (e.g. the NATO) and increases Ukraine’s dependence on Russia in the area of security and defence. A significant challenge for Ukraine is the existence of the Transnistrian Moldovan Republic, an internationally unrecognized entity supported by Russia, which neighbours directly with Ukraine. Ukrainian authorities do not undertake any decisive action to resolve this problem, de facto supporting Transnistria. This stems both from the desire to maintain friendly relations with Russia, and the wish to keep the benefits brought by co-operation with the unrecognized republic. Many years of Ukrainian lands belonging to the Russian empire and later the USSR contributed to creating strong societal dependencies between Ukraine and Russia. An important role was played in particular by voluntary and forced migrations, both from Russia to Ukraine and vice versa, as well as the policy of Russification implemented by Russian and Soviet authorities. As a result, there is a large Russian minority in Ukraine. It is particularly strong in the Southern and Eastern regions, as well as in Crimea, which, discreetly supported by the Russian authorities, in the 1990s undertook actions aimed at gaining partial independence from Ukraine. However, societal dependencies are not only related to the existence of a Russian minority in Ukraine. The majority of Ukrainian society is in favour of a close co-operation with Russia, considering it is an important partner for Ukraine. What is more, one can observe strong regional differentiation in Ukraine’s approach to relations with the Russian Federation. The inhabitants of Southern and Eastern Ukraine are more favourable towards cooperation with the Russian neighbour, whereas those living in Western and Central regions display relatively greater scepticism. It is also worth noting that there is a large community of Ukrainians living in Russia: some of Russian citizenship, others who came after 1991 in search of employment. Dependencies in the field of culture, science and religion have similar roots as the societal ones. Moreover independent Ukraine has a decidedly smaller cultural potential than Russia, which makes it easy for the latter to penetrate the Ukrainian society. The dependencies manifest themselves in four principal areas. Firstly, the Russian language, which is officially the second most common language in Ukraine, but in reality, dominates the Eastern and Southern parts of Ukraine, the press and the digital media. The Ukrainian authorities have made some attempts at the Ukrainisation of the society, while Russia is in favour of adopting Russian as the official language in Ukraine. The second element is the legacy of the Soviet historiography in Ukraine. After 1991, Ukraine tried to create its own national history, but some important events, such as the Second World War are still viewed through the lens of the Soviet or Russian historiography by most of the political class and the society. One of the two most important denominations in Ukraine is the Ukrainian Orthodox Church (Moscow Patriarchate), part of the Russian Orthodox Church. It is closely affiliated with the Russian authorities and promotes ideas consistent with the political line of the Russian Federation, such as the unity of the three Slavic nations. Finally, the last noteworthy element is the position of the Russia in the Ukrainian media system. This position is a consequence both of the popularity of the central (i.e. Moscow-based) media in the Soviet times, as well as of the weakness of the Ukrainian media. The Ukrainian society still likes to watch Russian television and read newspapers mostly edited in Russia; also, Russian websites enjoy great popularity in Ukraine. The last important area of Ukrainian dependence on Russia is Ukraine’s foreign policy. Ever since 1991 Russia has been making efforts to reintegrate the post-Soviet area, or only some countries of the region; and Ukraine was an important subject of these efforts for the Russian authorities. The Ukrainian authorities consequently resisted Russian aspirations by blocking the attempts to strengthen the Community of Independent States (CIS) and the Common Economic Area, as well as by refusing to join the Customs Union. Russia’s attempts to hinder Ukraine’s co-operation with the NATO and the EU turned out more effective. It was a result of both objective difficulties that Ukraine had in meeting the requirements of the Western institutions and the Ukrainian society opposing the attempts to join the NATO, as well as the reluctance of the Western states to co-operate more closely with Ukraine, which could negatively affect their relations with Russia. The dependencies linking Ukraine to Russia are a result both of independent factors, in particular common history and geographical proximity, and the policies of both countries. Those relations are created by institutions engaged in mutual co-operation, such as Gazprom and the affiliated companies or the Russian Orthodox Church and its sub-part - the Ukrainian Orthodox Church (Moscow Patriarchate). They are created by people who one way or another act in favour of bringing both countries closer together: Konstantin Zatulin, Yury Luzhkov, Dmytro Firtash, Dmytro Tabachnyk, Vadym Kolesnichenko and others. These dependencies are both formal and informal, with the latter having considerably more weight in the long run. Ukraine has not acceded to those agreements in the framework of the CIS which it considers harmful to its interests. It is also entitled to renegotiate with Russia agreements regarding the gas supply or the stationing of the Black Sea Fleet. But the Ukrainian authorities have only a limited power, should they deem it necessary, to influence the society’s attitude towards Russia, the position of the Ukrainian Orthodox Church (Moscow Patriarchate) or the popularity of the public holidays dating back to the Soviet times. In the foreseeable future, the asymmetrical character of relations between the Russian Federation and Ukraine will not alter. Ukraine will continue to pursue a policy which will be to a lesser or greater extent friendly to Russia. However, it is important that the relations with Russia do not contribute to increasing the underdevelopment of Ukraine or hinder its freedom to act on the international stage but contribute to the stabilisation of the international order created after the fall of the Soviet empire.