You answer a question with more questions. I am much more interested in your answers to those questions. While I posed one question, you have submitted several additional queries. Where as I asked "what" your solution so one question might be, you posed several "why" questions. Given that, why do you think your suggested problems exist in this country particularly, and not other first world countries? What solutions would you suggest to solve the problems inherent to your problems?
Well, maybe I do. But that's because the first question is so simplistic, that if you answer that question, you'll be no nearer to understanding the problems at all. But then this suits many people.
You want some solutions.
Solution number one is to implement Proportional Representation in the House and Presidency elections, with the latter having a run off. Potentially the former having a system similar to Germany with a half PR half FPTP system with constituency candidates being elected too.
Why is this my first solution? Because any other solution is a pipe dream with the Democrats and Republicans controlling everything.
The first question being mine, or yours? If yours, the US doesn't have a higher crime rate than other first world countries. The types of crimes may be different, but crimes are still committed. The distribution of crimes against persons vs. crimes against property may be greater, or lesser, depending on the country. If your contention is that crimes against persons are more prevalent here than in other, similar countries, have you reviewed where, how, who, and why such violent crimes occur. (I do not accept that access to firearms is a significant factor, but that's a different discussion.) How do you explain the recent increase in crimes against persons in equivalent societies?
Theoretically, proportional representation in our governing bodies should already exist. I certainly agree that the current two-party system does little to represent any of the PEOPLE of this country because the politicians are much to busy representing their own interests and catering to the interests to the entities who have bought them. Both Dems and Reps represent the best government that money can buy. They are only interested in blacks, whites, browns, or what-have-you in-so-far as they can get up to vote them into office. Then, all bets are off.
You might not like this, but I'd like to see blacks, the elderly, and other perceived victims stop buying into the fiction that they are somehow incapable of figuring out how to do things for themselves. The whole voting ID thing bugs me. There are whole sectors of the populace who are deemed totally helpless when they must acquire a photo ID, although those IDs are provided free to anyone who applies. They just buy into that fiction that they are too: stupid, incapable, unable, etc, to figure out how to do something so simple.