Early in his book, The Modern Mind: An Intellectual History of the 20th Century (2001), Peter Watson divides the century into four parts, each determined by a change in its shared sense of the future.
1. 1900-1914. In 1900, the dominant sense was one of optimism. Dramatic changes were taking place in society, with new methods of transportation and communication; and in culture, in both the arts and sciences. These changes gave the impression that the future of society and culture would be different and better than in the past. People shared the sense that history was a story in which a growing number of people would actually live better than their parents had.