One thing we are hearing about the SCOTUS gay marriage cases is that we can't allow gay marriage nationwide this fast because of the "newness" of the concept. Justice Alito seems specifically temporally troubled, worrying aloud, "You want us to step in and render a decision based on an assessment of the effects of this institution which is newer than cell phones or the Internet?" Adam Serwer at Mother Jones compiled a list
of things newer than the Internet the court managed to rule on without upsetting our dead founding fathers, including crush videos, military commissions, and Obamacare. "This list is by no means exhaustive," he writes. "It's just a handful of cases in which Alito has been able to figure out how to interpret the Constitution without an egg timer."