From college campuses in Indiana to bars in New York City, men and women are using technology, Tinder, to find available partners in the vicinity, for one thing only: sex.This is the marriage apocalypse. All of this endless swiping is producing men and women who have an infinite choices of sexual partners with no strings attached. How long before this has a serious effect on how you view members of the opposite sex? In the past few decades, the average age of first marriage has climbed significantly — to all-time highs of almost 30 for men and 27 for women. And the marriage rates have plummeted. There were 31 marriages per 1,000 women in 2014, compared to 1920, when it was 92 per 1,000. Pope Francis would not approve. What’s doubly depressing is that has affected the poor more than the rich. For college graduates, the rates of marriage have been almost unchanged. But among those with lower incomes, it’s plummeting, which leads to a vicious circle. Studies repeatedly show th...