Hans Rosling's talks are getting worse over time. The United Kingdom and Scandinavia are 50% Christian? I don't think so. I'm sure it makes perfect sense to him to include Catholic and Protestant together, or Quiverfull and Anglican. Religious values don't involve having children, gender roles (e.g. women staying at home, not being educated), access to contraceptives and sex education? Rosling didn't need to do any research, because there can't be any other conclusion regardless of the results, he's defined "religion" in such a way that it's meaningless to say that it's not about "religion" or that the birth rate can decrease while retaining religious values. Is Hans Rosling suggesting that secularisation and reduction of the political and social power of religious organisations have no effect on birth rate? Yes, because under his reasoning the Roman Catholic Church's stance on condom use is 98% in favour of use for women 15-44 in the US 2006-2008, they have successfully retained their religious values.