The text is an excerpt from the book "Tragedy and Hope" by Carroll Quigley, a work that traces a world history of civilizations with a unique perspective. The excerpt focuses on the cycles of growth and decline of civilizations, analyzing the causes that lead to their collapse, with particular attention to imperialist wars and class struggles. Quigley also explores the role of technology, industrialization, and capitalism in the development and decline of civilizations, highlighting the economic inequalities that often manifest themselves in the process. Finally, the excerpt addresses the birth and evolution of the Cold War, analyzing the tensions between the United States and the Soviet Union and the key role of the nuclear arms race.