Mary Wareham laughs a lot. It usually sounds the same regardless of the circumstance — like a mirthful giggle the blonde New Zealander can’t suppress — but it bubbles up at the most varied moments. Wareham laughs when things are funny, she laughs when things are awkward, she laughs when she disagrees with you. And she laughs when things are truly unpleasant, like when you’re talking to her about how humanity might soon be annihilated by killer robots and the world is doing nothing to stop it.
One afternoon this spring at the United Nations in Geneva, I sat behind Wareham in a large wood-paneled, beige-carpeted assembly room that hosted the Convention on Certain Conventional Weapons (CCW), a group of 121 countries that have signed the agreement to restrict weapons that “are considered to cause unnecessary or unjustifiable suffering to combatants or to affect civilians indiscriminately”— in other words, weapons humanity deems too cruel to use in war.