I'm open to being wrong. This would be an interesting point to research as an economist. You're right in that in the past 50 years unhealthy food has become rel

I'm open to being wrong. This would be an interesting point to research as an economist. You're right in that in the past 50 years unhealthy food has become relatively cheaper compared to healthy food. My thought was comparing the cost of a particular balance of nutritional value from now, to past centuries and millennia. Maybe it doesn't hold for the economic "golden years" in America from 1950-1970. My completely arbitrary estimate is that total food costs as a percentage of total household consumption has plummeted from something like 40-50% to about 2-5%. Of course, there are regional differences. At the moment, in the developing world getting enough protein is a challenge. For many historically meat was prohibitively expensive. But it wasn't so for people close to hunting or fishing industries.