Thinks like rice, potatoes, pasta, corn, barley etc.

Dr John McDougall is a doctor who's been working for around 40 years trying to change our attitude towards food using history and scientific research. We've been taught to be scared of starches and carbs because we've been told they make us gain weight but it's not true at all. Our protein recommendations are based off flawed, ancient research. We eat far too much fat in our diets and it's causing massive health problems. Many health conditions have been proven to be undone with a high carb/starch, low fat diet including heart disease and type 2 diabetes.

Do your own research though, don't just trust me. All of his resources are free on his website and he has tonnes of published papers and support from other scientists/doctors.