1. Spread risk: from the few to the many (most important)
2. premiums are used to pay losses
3. Insurers participate in loss prevention/reduction measures
4. Peace of mind: eliminates worry and allows people to take risk
5. Pay small fixed amounts to fend off large uncertain amounts
6. Supply Credit: Lenders won't lend for unprotected property
7. Source of jobs & capital: Insurers invest their premiums