Steve King, a Republican congressman from Iowa, insisted on Monday that there was nothing wrong with the lack of diversity at the Republican National Convention since, he said, members of other races had contributed relatively little to human civilization.

King’s literal assertion of white supremacy, in response to criticism of the party by the Esquire blogger Charlie Pierce, came during a live appearance on MSNBC and seemed to stun the host, Chris Hayes, as well as Pierce and April Ryan, American Urban Radio Networks’ Washington bureau chief.

“This ‘old white people’ business does get a little tired, Charlie,” King said. “I’d ask you to go back through history and figure out, where are these contributions that have been made by these other categories of people that you’re talking about? Where did any other subgroup of people contribute more to civilization?”

Asked by Hayes if he was arguing that other races had contributed less “than white people,” King added, “than Western civilization itself, that’s rooted in Western Europe, Eastern Europe and the United States of America and every place where the footprint of Christianity settled the world.”

Although Ryan asked, “What about Africa? What about Asia?” Hayes took it upon himself to reply, noting that Western civilization had also contributed “Hitler and Stalin as well.”

King’s remarks were not well received on social networks by non-racists or those with even the slightest grasp of history.

King’s frank defense of the disproportionately white makeup of the Republican party came just days after Speaker Paul Ryan inadvertently drew attention to the same problem by posting a selfie on Instagram showing the lack of diversity in the party’s current crop of Capitol Hill interns.