Such behavioral, preference, lifestyle, openness, and attitude changes include: Alternative gender/sexual identity expressions diverging from family focus, stress/anxiety, voluntary celibacy, perfectionist family planning (contraception, abortion, workaholism, and stricter goals), shallower human interactions, disillusionment of love, casualness of increased divorces, elongated adolescence, extended non-monogamy, "failure to launch," distractions like screens and video games, and, inadvertently, fertility reduction causes like obesity and plastics. I'm certain there are more factors I missed and some that are minor.