What would the US be like today if it had stayed out of all foreign wars after 1945?

Like, say we had not given in to the Red Scare and stayed out of the Korean War and Vietnam, what all do you think would be different with the US and the entire world in 2023? How many subtle butterfly effects would've never happened, and how many things that seemed bad at the time would've naturally unraveled themselves over the decades (akin to the dissolution of the Soviet Union)?

Would the US look strong, weak, or neither today, from the point of view of potential aggressors?

Would people other than Putin, Xi and Kim be in power today? What would our relations be like with those countries today?