The organic foods needed for the Paleo diet can be difficult to obtain and are very expensive. Many people argue that the fruits and vegetables we eat today are not the same ones that early humans would have eaten; broccoli is only 2,000 years old, bananas are about 3,000 (Tufts University, 2015). Others argue that a predominantly meat-based diet is not sustainable for the world's population. There are no long-term studies to support that the Paleo diet has lasting health benefits; in fact many argue that cavemen lived shorter lives, so they didn't have time to develop the diseases we have in modern society (cancer, diabetes). Ultimately, cavemen were not picky eaters and likely ate a variety of foods based on when they lived (the Paleo period spans millions of years, ending over 13,000 years ago), where they lived, and what was available (it varied by region where they lived). , including inland or coastal areas). Cavemen probably had periods of feast and famine, a diet not acceptable to them