(Co-written by W. Bradford Wilcox, director of the National Marriage Project at the University of Virginia) Has the rise of screen culture—smartphones, gaming, and tablets—hurt relationships? It’s an important question as research shows that the current cohort of young adults (i.e., Millenials and iGen) are dating less, marrying less, and having sex less than older cohorts did when they were the same age. These studies, which have focused on unmarried individuals, have speculated that these relationship trends are due—in part—to the contemporary experience of omnipresent interactive technology...