But for all of these neocons stuck on the wrong side of history — Dick Cheney, Donald Rumsfeld, John Bolton, say the names loud and clear — it’s not a change in conscience at work; it’s a change in presidents. Later this month, dozens of Republicans in Congress will make the same decision, simply because they hate Obama, and would oppose him if he declared Grandmother Appreciation Day.

The voice that stands out most by his silence, the one that grates with its public coyness, is Bush himself. He has refused to take a side in the Syrian conflict. The president, he said, “has a tough choice to make.” Beyond that, “I refuse to be roped in.”

This is cowardice on a grand scale. Having set in motion a doctrine that touches all corners of the earth and influences every leader with a say in how to approach tyrants who slaughter innocents, Bush retreats to his bathtub to paint.