Sociologists have long considered suicide to be the gold standard measure of psychological wellbeing. Now we have a long-term study that finds that marriage protects men more than women from themselves.
As long as same-sex couples can't get married, research can't tell us much about what same-sex marriage will be like -- especially how legal recognition might affect their social legitimacy in the eyes of others.
Even controlling for income, education, obesity, smoking, and some diseases, Black infant mortality is significantly higher. This presumably indicates worse healthcare.