By David Brooks
Roughly 10 percent of the children born to college grads grow up in single-parent households. Nearly 70 percent of children born to high school grads do. There are a bunch of charts that look like open scissors. In the 1960s or 1970s, college-educated and noncollege-educated families behaved roughly the same. But since then, behavior patterns have ever more sharply diverged. High-school-educated parents dine with their children less than college-educated parents, read to them less, talk to them less, take them to church less, encourage them less and spend less time engaging in developmental activity.