Well as for obesity rates (besides other factors) my understanding is that around the 70s governments decided that dietary fat and cholesterol was the primary c

Well as for obesity rates (besides other factors) my understanding is that around the 70s governments decided that dietary fat and cholesterol was the primary cause of heart attacks and the side effect is that people significantly increased their carb intake. Edit: As for the wealth inequality thing, plenty of people have written about what changed in the 1970s onwards. Deregulation, free trade, workers' unions fading out...