To observe due process would be to do away with the social contract? I think not. I'd like to see trials, and if guilt is decided, then a penalty. That's what an intact society looks like. Take it easy. You're going to blow a gasket or something.

The "tipping point" for irreversible climate change is almost universally judged to be 2C warming above preindustrial levels (we're at 1C warming). Another quantified guideline is 350ppm CO2; although we're already >400ppm. 

Nobody asked me to quantify things like this on this thread, but they're not hard to find. The state and city's climate guidelines offer up suggestions for how to deal with this. The Paris Accords do too.