1 Arithmetic. Children learn early to call chaos to order, to safety-pin themselves to the cloth of the cosmos. I watch my two-year-old son, Max, develop this survival skill in curious ways. On the airplane leaving the Marshall Islands, he is enthralled by a calculator, his comfort toy as we move to our next diplomatic assignment. He’s pressing Enter over and over, but he’s quiet and I can sleep. In an empty apartment in Montreal, my husband and I listen in shock as our son cheerfully recites the powers of two up to 2^27 — from 2, 4, 8, 16, up to 134,217,728. The same quiet power of two assembles the 2^44 cells of newborns. Max cries when his calculator breaks.
2 Area. Incrementing by one on his new calculator,…