In the ear­ly 20^th cen­tu­ry, Max Weber argued that Protes­tantism cre­at­ed wealth. Final­ly, there are data to prove if he was right. All it took were some mis­sion­ary exper­i­ments in the Philip­pines and a clever map-match­ing trick that goes back to 16^th-cen­tu­ry Germany.