Who controlled pop'n. in the Middle Ages (MA)? Did medieval people really think about the possibility of pop'n. control (PC) or did they act without thought in the matter? Chapters: the pop'n. of Pompeii and Rome; the villages of the dead; to quicken the dead; how long did they live?; potential energy and dependency; the spread of TB in the West; the earlier medieval plague in the British Isles, and on the Continent; the threat of too many mouths; pop'n. stability, A.D. 0-1000; the medieval pop'n. crisis, 1000-1348; divergent trends of PC; tests of demographic interests; the strength of will to control; climate and migration; and burial of heretics in the MA. Biblio. 53 tables.