Actually someone has to be latest, and rather each civilization for some time t will have its turn at being the latest.

looking at the data, it’s like we’re trying our damndest to be last. Defunding education, limiting what can be taught (ex: Texas removing critical thinking), etc all seem like we just enjoy tripping on our own shoe laces

You're focusing on the wrong scale. Intelligence has skyrocketed in the past thousand years. Policy decisions in our lifetime, do not matter or they end all human matters at once.

Certain policy decisions matter on a larger scale. Killing off millions of people has to have some meaning on future abilities, right?

I think that generally I agree with you, but I would tend to say you have a small (but >0) number of things that would have huge long term ripples.

> Defunding education, limiting what can be taught

Many people became educated and even advanced science before the government got involved in education.

Indeed who's to say if the current worldview we share is a knowledge maximizing one.