A time will come when men will sit with history before them or with some old newspaper before them and ask incredulously,"Was there ever such a world?" The Open Conspiracy (1933)
Human history becomes more and more a race between education and catastrophe... Yet, clumsily or smoothly, the world, it seems, progresses and will progress. The Outline of History (1920)
When the history of our civilization is written, it will be a biological history and Margaret Sanger will be its heroine.