Yes, but people in developed countries are also the biggest offenders. Even the most conscientious Americans have carbon footprints twice that of the global average. [0] And currently, the U.S. government pays citizens to have children. I have no idea if stopping that would have any impact, but slowly reducing the earned income tax credit is maybe a good place to start.

[0] https://www.sciencedaily.com/releases/2008/04/080428120658.h...