Is the jet stream caused by climate warm ups?

I suspect that global warming and cooling could both be the culprit that can play around with the jet streams. Maybe the climate is just warming up? Based on my knowledge, climate change is real, however, it's part of a natural process, and society's effects on it are so trivial and complicated that we might never come up with a definitive conclusion. All of our conclusions that we might come up with in the future might just practically be guesses, no matter how long we study climate. Beyond Earth, there's also the Universe, and have you ever considered the Universe's influence on Earth's climate, like the sun for example? However, if Earth stops warming, well hey, we still have other places to go to, true? If the Universe keeps existing despite Earth becoming destroyed, would Earth's fate really then matter to us?! I mean, there's much beyond Earth that we need to think about