There are very important and practical issues raised by following this alternative route which says, lets look to material conditions, to the systems of production, to the needs that human beings have, and to competing alternative solutions to the satisfaction of those needs.
Marvin HarrisPigs eat grass if they are very hungry, but they can't use it as a regular source of food.
Marvin HarrisWhen a woman gives birth to a child, the child needs to be able to digest the mother's milk; but when this child is old enough to begin to eat other foods, there is some switching off of this ability to consume milk.
Marvin HarrisNow we are in a situation in which for a significant part of the industrial world too much could become a danger, especially too much of the things which are really not good for us in such large quantities.
Marvin Harris