Another case where I thought Darwin made too many assumptions is when he says," The bravest men, who were always willing to come to the front in war, and who freely risked their lives for others, would on average perish in larger numbers than other men. Therefore, it seems scarcely possible, that the number of men gifted with such virtues, or that the standard of their excellence, could be increased throught natural selection, that is, by the survival of the fittest." Darwin has proved some physical traits are passed on through reproduction to offspring, but he has not proved that personality or emotions can be passed on to offspring. These qualities such as bravery and courage could be things that result from the environment they were raised in.