Under the combined influence of Science and History, and of social developments, the twofold sense of duration and collectivity has pervaded and re-ordered the entire field of our experience; with the twofold result that the
future, hitherto a vague succession of monotonous years awaiting an unimportant number of
scattered individual lives, is now
seen to be a period of positive becoming and maturing — but one
in which we can advance and shape ourselves only
in solidarity.