It’s hard to get our minds around the dimensions of the slaughter underway in the Middle East and Africa, and harder still to see that the battlefields of Egypt, Syria, Iraq, Afghanistan, Somalia, Nigeria and Mali are pieces in a global war in which we are targeted. For the most part, the deep thinkers zero in on the single battlefields. What if anything should we do about the big fight in Egypt? Should we assist the Syrian opposition? What to do in Lebanon or Jordan? Should we respond positively to the Iraqi government’s request for security assistance? Is anyone thinking hard about Tunisia, likely to be the scene of the next explosions?