If we are to define the role of government in a free society, we must first specify the needs a government is expected to provide. Defense from foreign enemies and protection of property, including the enforcement of private contracts, are clearly legitimate functions of government. But when we come to two other functions of government—providing a substitute for voluntary cooperation when it appears impossible to achieve, and providing for irresponsible individuals— the justification is much less clear-cut. In a free society people should be able to take risks but should not be able to force others to pay the consequences. …