Meat is the best source of protein.
Yeah right. Animal-based diet is directly associated with an increased risk of a plethora of disorders and diseases like liver failure, high cholesterol, cancer, heart attacks, diabetes, obesity, etc.... The American Cancer Society even says people should lower their intake of meat and recommends foods like fruit and veggies to lessen chance of cancer.
Meat is carcinogenic, its pumped full of sodium via the factory processes, its inflammatory, it slows your metabolism, lowers collagen production, increases chance of babies being born with diseases or disorders like obesity, usually very fatty and oily, contains feces and more airborne nasty bacteria than any other type of food, very easy to digest too much protein from meat. Need I go on?
On the other hand, populations with longevity and the greatest number of healthy years of life is associated with a plant-based diet.
Good luck convincing me otherwise. I know my nutrition.