By Francis X. Maier, First Things - Here’s a simple fact: Many of today’s social issues are important, but not all of them have the same gravity. And it’s misleading to tie them all together as somehow equivalent, because they’re not. Concern for the environment, more effective gun laws, and better immigration policies is a good thing. But being “right” on those issues can’t balance out being wrong on killing, or tolerating the killing of, a developing human child...