"In Southeast Asia and Latin America, average fertility dropped from six or seven children per woman to two or three in a single generation, thanks in large measure to the modern contraceptives available by the 1960s."
The article is talking about our world, which is one in which contraceptives are widely available. We can't really look at alternate realities in which there are rich countries with no contraceptives and see how their birth rates fared, but I see no reason to assume they would drop, because people will still have sex.
The Malthusian explosion is not a valid concern precisely because of contraception.
"In Southeast Asia and Latin America, average fertility dropped from six or seven children per woman to two or three in a single generation, thanks in large measure to the modern contraceptives available by the 1960s."
The article is talking about our world, which is one in which contraceptives are widely available. We can't really look at alternate realities in which there are rich countries with no contraceptives and see how their birth rates fared, but I see no reason to assume they would drop, because people will still have sex.
The Malthusian explosion is not a valid concern precisely because of contraception.