Sustainable cycles of eating and diets for hunter-gatherers are examined in this chapter, with some attention to amounts of meat consumption in their food ecology. Cultural evolution is presented from various theories, like particulate neural transfer, population system thinking, or group sociocultural selection. Darwinian selection and other mechanisms of cultural evolution are studied. Group hierarchy, egalitarianism, moral norms related to eating, diets, and veganism are covered. Customs, consumption, and tradition relevant to food are treated from various angles. Human culture as an evolutionary process that shapes the mind is discussed in relation to veganism. In-vitro lab meat is fully discussed, mostly in terms of the high cost of research and development and low health and climate potential.