In this title, originally published in 1950, the author has set out to give a description and a critical assessment of the most important (not necessarily the most famous) Utopian writings since Plato first gave, in his Republic, a literary form to the dreams of a Golden Age and of ideal societies which had doubtless been haunting man since the beginning of the conscious discussion of social problems. It is more than a mere compilation and criticism of Utopias, it brings out in a striking way the close and fateful relationship between Utopian thought and social reality, and takes its place among the important books which had appeared in the previous few years, warning us, from various points of view, of the doom that awaits those who are foolish enough to put their trust in an ordered and regimented world.