How we cite our quotes: (Chapter.Paragraph)
Quote #10
For reasons the Overlords could not explain, but which Jan suspected were largely psychological, there had been no children to replace those who had gone. Homo sapiens was extinct. (23.49)
Another inescapable aspect of life present in Childhood's End is that life has to end, for individuals and species as a whole. It's not exactly the most uplifting part of the theme, but it's pretty accurate and important.