Many of the men work off the books as handymen. Many spend long stretches out of the labor force, hanging around with friends and bumming off others. Some have entrepreneurial dreams that seem, from the outside, unrealistic — like making a living as a novelist or a D.J.

Their private lives are as loosely attached as their economic lives. Many of the men expressed the desire to be good fathers to their children — to be more emotionally expressive around their kids than their own fathers had been with them. But they expressed no similar commitment to the women who had given birth to those children. Some found out they were fathers only years after their children were born.

“Nearly all the men we spoke to viewed the father-child tie as central while the partner relationship was more peripheral,” Edin and her colleagues write. Naturally, if the men are unwilling to commit to being in a full family unit, the role they actually end up playing in their children’s lives is much more minimal than the role they really want.

The men are also loosely attached to churches. Most say they are spiritual or religious. But their conception of faith is so individualized that there is nobody else they could practice it with. They pray but tend to have contempt for organized religion and do not want to tie themselves down to any specific community.

“I treat church just like I treat my girlfriends,” one man said. “I’ll stick around for a while and then I’ll go on to the next one.”