We must recognize-and forgive Mr. vegetarianos- has not been without the consumption of meat as the man has become man; and the fact that, at one time or another in the history of all known peoples, the use of meat in the diet has led to cannibalism is not an issue for us today is minor.
When an industrial or merchant sells the goods produced or purchased by him and gets the usual profit, it is satisfied and does not care in the least what might happen later with the goods and the buyer. The same applies to the natural consequences of those same actions.
Friedrich Engels