I think americans are more ignorant than i thought

I thought most americans caught up to 2025 but unfortunately there are quite a few americans who are still living with backward beliefs and ignorance from the 20th century and forgotten about proven methods in science and philosophy and just plain common sense, you dont need a book to know about life in the 21 st century ,you just need to get to know people , of diverse backgrounds and learn ,that way because that is where human beings learn more directly