War is an unfortunate part of human history. Driven by the desire of a few to control the rest. It produces more death than disease and famine. Mankind has parted with many of its own due to wars, natural causes and disease. Death leaves more than memories behind. It also leaves behind organic mass. On average about 136 pounds of such mass per deceased.
Assuming a constant growth rate and birth rates of 80 per 1000 through 1 A.D., 60 per 1000 from 2 A.D. to 1750, and the low 30s per 1000 by modern times, 105 billion people have lived on earth, of whom 5.5% are alive today.