Actually, that change took place well before the introduction of reliable birth control. See "A Farewell To Alms" for an account of the transition from resourc

Actually, that change took place well before the introduction of reliable birth control. See "A Farewell To Alms" for an account of the transition from resource-limited birth rates to the modern world: http://www.amazon.com/Farewell-Alms-Economic-History-Princeton/dp/0691141282 http://www.amazon.com/Farewell-Alms-Economic-History-Princet...