Speaking of Economics last weekend I had another stupid one. My empire had 5000+ gold stored I am on 500+ gold a turn with a massive trade route empire and 2 AI's who where green friendly suddenly got angry and decided I am going bankrupt and so went from green to red.Or insulting you and becoming angry because you do not have a tech that even itself doesn't have while is 1000 turns away. eg Economics while it is on 3000BC. (a bright example).