F.A. Hayek, The Road to Serfdom

[The philosophy of individualism] does not assume, as is often asserted, that man is egoistic or selfish or ought to be. It merely starts from the indisputable fact that the limits of our powers of imagination make it impossible to include in our scale of values more than a sector of the needs of the whole society, and that, since, strictly speaking, scales of value can exist only in individual minds, nothing but partial scales of values exist -- scales which are inevitably different and often inconsistent with each other. From this the individualist concludes that the individuals should be allowed, within defined limits, to follow their own values and preferences rather than somebody else's; that within these spheres the individual's system of ends should be supreme and not subject to any dictation by others. It is this recognition of the individual as the ultimate judge of his ends, the belief that as far as possible his own views ought to govern his actions, that forms the essence of the individualist position.

This view does not, of course, exclude the recognition of social ends, or rather of a coincidence of individual ends which makes it advisable for men to combine for their pursuit. But it limits such common action to the instances where individual views coincide; what are called "social ends" are for it merely identical ends of many individuals -- or ends to the achievement of which individuals are willing to contribute in return for the assistance they receive in the satisfaction of their own desires. Common action is thus limited to the fields where people agree on common ends. Very frequently these common ends will not be ultimate ends to the individuals but means which different persons can use for different purposes. In fact, people are most likely to agree on common action where the common end is not an ultimate end to them but a means capable of serving a great variety of purposes.

[Chapter Five: Planning and Democracy]