Question

What was a change in science or technology led to a major political, social, or economic effect in the United States

Answer 1

Space race hope this helps!!

Answer 2

The use of an atomic bomb, or even something like chemical warfare. I forgot who it was but there was a chemist who made a gas meant for paralyzing. He wanted to disarm an army to avoid casualties but ended up killing them and allowing the US to abuse it.