I would try to derail Reagan's political career before it got off the ground; I think without his charisma and amiability which won people over,I don't think the republicans win in 1980?

I don't care about the USA to be honest. I'd take all the science texts I could gather with me and spread all the knowledge everywhere. Maybe show people how solar power works, tell them about the causes of diseases and how to cure them makes more sense than to kill any single person. If Hitler was killed others would have taken over the fascist cause. Trump similarly is just a symptom of an unjust society and religions are a symptom of an uneducated society. Treat the causes not the symptoms.

Slavery should have ended with the revolutionary war. Women should have had the right to vote from the start of the country. All equal in relation to the LAW. Keep and protect the Monroe Doctrine so we wouldn't get involved in European and Asian wars.

Stop the anti-communism hysteria per McCarthy....directly responsible for putting "god" in the Pledge of Allegiance & rise of church/state separation erosion.

Option 2 Most of world wouldn't be mad at us and have there nukes pointed at our country. Option 3 For people wouldn't be in hiding due sexual preference, etc.