Given the rigors of contemporary career-building, pre-adults who do marry and start families do so later than ever before in human history. Husbands, wives and children are a drag on the footloose life required for the early career track and identity search. Pre-adulthood has also confounded the primordial search for a mate. It has delayed a stable sense of identity, dramatically expanded the pool of possible spouses, mystified courtship routines and helped to throw into doubt the very meaning of marriage. In 1970, to cite just one of many numbers proving the point, nearly seven in 10 25-year-olds were married; by 2000, only one-third had reached that milestone.