A Conflict of Visions by Thomas Sowell

Those with the realist vision of life believe that, since the moral and intellectual limits of human beings are rooted in an unchanging human nature, a good social order must make the best of these natural limitations. Those with the utopian vision scorn such unplanned evolution because they think that social decisions can and should be deliberately designed by rational planning to promote the common good. The realist vision was manifested in the british revolutionf 16 88, in the american revolution of 17 76 and in the framing and ratification of the American constitution.