In a comment on a 2014 blog post on Mr Cummings' website, made by a user called "Andrew Sabisky" that used the same picture as his Twitter page, he suggested that compulsory contraception could be used to stop a "permanent underclass".
"One way to get around the problems of unplanned pregnancies creating a permanent underclass would be to legally enforce universal uptake of long-term contraception at the onset of puberty," he wrote.
"Vaccination laws give it a precedent, I would argue."
In a comment on another blog post on a different website in 2014, what appears to be the same user suggested black Americans had a lower average IQ than white Americans.
In a comment on a different blog that same year, a user with his name said: "There are excellent reasons to think the very real racial differences in intelligence are significantly - even mostly - genetic in origin, though the degree is of course a very serious subject of scholarly debate."
Mr Sabisky also suggested to Schools Week in July 2016 that the benefits of a purported cognitive enhancer, which can prove fatal, are "probably worth a dead kid once a year".
"Eugenics are about selecting 'for' good things," he said in the same interview. "Intelligence is largely inherited and it correlates with better outcomes: physical health, income, lower mental illness.
And in a Twitter post from 2019, he said: "I am always straight up in saying that women's sport is more comparable to the Paralympics than it is to men's."
https://www.bbc.co.uk/news/uk-politics-51535367
