Andrew Cherlin's main point in The Marriage-Go-Round is that Americans should slow down in starting relationships, so that we will not be as likely to end them. Children are hurt each time adults come and go from their households.
One of the most interesting empirical points Cherlin makes comes from a study he did with Paula Fomby. They found that “for each partner who had entered or left the household, the odds that the adolescent had stolen something, skipped school, gotten drunk, or done something similar rose by 12 percent” (191). He is most of them still didn’t do these things, but the risk increases, and some kids succumb to the danger.