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Leaders who forbid their followers to use effective contraceptive methods express a preference for "natural" methods of population limitation, and a natural method is exactly what they are going to get. It is called starvation.

Richard Dawkins (2016). “The Selfish Gene: 40th Anniversary edition”, p.144, Oxford University Press
Leaders who forbid their followers to use effective contraceptive methods express a preference for natural methods of population limitation, and a natural method is exactly what they are going to get. It is called