Marriage vows are for keeps these days. The oft cited number that half of all American marriages fail isn’t true anymore. Yes, the stats reflect reality for the 1970s and 1980s, but couples wed in the 2000s appear on track for better results. Among the reasons: marrying later, having more education, and having different expectations than couples living through the turmoil of the sexual revolution. While there may remain a host of personal reasons not to marry, fear of soaring divorce rates shouldn’t be among them.