Also just because others thought similar things doesn't mean it isn't true now. The progress since sometime in the 1800s has been insane. If in 100,000 years a super smart civilization, unimaginably advanced, looks at an estimated world population time series, they will be objectively impressed that those guys figured out / stumbled upon some impressive things to manage that. It's really interesting to think about just how desolate the world was even a few hundred years ago. Almost all our big cities today were little towns, except for like 1 or 2 globally. The change is undeniable. It's not all subjective and "they said X, we say X, nobody can decide if X is true, what is truth anyway, etc"