The Upswing: How America Came Together a Century Ago and How We Can Do It Again

by Robert D. Putnam

102 In short, in the two “I” periods at the beginning of the twentieth and twenty-first centuries, fewer people married and had kids, and those who did, married later and had kids later, whereas in the mid-century “we” period, for virtually all Americans that “we” began with their nuclear family.