[knuthsat]

Yet the average calorie intake in the USA, Australia and UK is at its highest amount in history.

My country (Croatia) went from an average of ~20kg of meat per year per person (~1990s) to ~70kg of meat per year per person in 30 years. The amount of calories is obviously massively different. The mediterranean diet in Croatia is dead.

People are getting obese and getting diseases that come with obesity (heart disease, diabetes etc.). Meat is not to blame, it's people eating massive amounts of calories, living an unhealthy sedentary lifestyle.

CICO model works for healthy people. For those with metabolic disease (diabetes and similar) it might not work completely.