"The liberal sees outer, removable institutions as the ultimate source of evil; sees man's social task as creating a world in which evil will disappear. His tools for this task are progress and enlightenment. The conservative sees the inner unremovable nature of man as the ultimate source of evil; sees man's social task as coming to terms with a world in which evil is perpetual and in which justice and compassion will both be perpetually necessary. His tools for this task are the maintenance of ethical restraints inside the individual and the maintenance of unbroken, continuous social patterns inside the given culture as a whole."
-"The Unadjusted Man" (Beacon Press, 1956)
For those smarty-pants among you who think they know the difference between Liberals and Conservatives, read a bit of Viareck before you align yourself with the propaganda-based definitions commonly accepted post-Buckley. Check out the Times obituary, as linked to this post, for a quick overview. I recommend reading his book, "Conservatism Revisited". Us 'liberals' would do well to revisit his theories.