With existing social and political issues, we too are putting ourselves in a worse place. Before you blame "them," understand I see it as our fault for, perhaps, needing to put our interests first rather than keeping hope, empathy, civility, and consensus-building on the front burners.
There is no clear basis for representative government, no experience with political compromise and making elections work, and no pattern of effective governance combined with economic progress and social evolution to build upon. Ethnic and religious issues often cut deep and have been repressed for decades. Justice systems are weak and/or corrupt, religious extremism challenges necessary social and economic change, and the security forces are often an equal or more serious problem.
Ethnic and religious issues often cut deep, and few solutions exist, without agreeing with the simple majority, to be accepted as an equal and worthy of inclusion.
In the USA, we enjoy a republic democracy so everyone's rights and pursuit of freedom could be protected. Read the Federalist Paper 10-it is well written. While many think those in the minority are a problem, it might be that those in the majority can do more harm.
If we know what is required for a stable system, why would anyone, from any party, do that which would decrease stability?
It is an interesting read...