I read once that the divorce rate for teen-age marriages is asymptotically close to 100%. I don't know if this is true, but I'm sure the rate is high nonetheless. Even so, Mark Regnerus, a sociologist at the University of Texas, argues compellingly that we should marry young (though not that young) and that the trend toward waiting until the late twenties or thirties has several liabilities:
The average age of American men marrying for the first time is now 28. That's up five full years since 1970 and the oldest average since the Census Bureau started keeping track. If men weren't pulling women along with them on this upward swing, I wouldn't be complaining. But women are now taking that first plunge into matrimony at an older age as well. The age gap between spouses is narrowing: Marrying men and women were separated by an average of more than four years in 1890 and about 2.5 years in 1960. Now that figure stands at less than two years.
One obvious reason for not postponing marriage is that it gets harder for women as they get older to attract men whereas it actually gets easier for older men to attract younger women.
[A]ccording to social psychologists Roy Baumeister and Kathleen Vohs, women's "market value" declines steadily as they age, while men's tends to rise in step with their growing resources (that is, money and maturation). Countless studies -- and endless anecdotes -- reinforce their conclusion. Meanwhile, women's fertility is more or less fixed, yet they largely suppress it during their 20s -- their most fertile years -- only to have to beg, pray, borrow and pay to reclaim it in their 30s and 40s.
These are just two of the reasons Regnerus offers in support of his thesis that it's in a woman's interest to marry young. You'll have to read his essay to learn the others.
Meanwhile, I should mention that one of the best books I've read on this topic is George Gilder's Men and Marriage, a work published back in the 80s and one I can't recommend highly enough to anyone interested in the sociology of marriage. Gilder argues convincingly that the revolution in sexual mores of the last fifty years has actually devastated many young women and ruined their chances of a happy marriage. It's good stuff, as is the Regnerus article.
RLC
