It's well-known that Google search prioritizes newer content over older content, and history-related content created over the past few years tends to focus pret

It's well-known that Google search prioritizes newer content over older content, and history-related content created over the past few years tends to focus pretty overwhelmingly on race, gender, etc. So a sensible null hypothesis, is that Google's just showing you a representative sample of the new-ish content that's out there.