e objective of each organism to try to ensure the future existence of its species through reproduction. It is this objective that explains attraction to the opposite sex and why certain traits are selected for in a mate. Although it seems the selection of a mate is random, it actually has more to do with ensuring the survival of ones gene pool than we realize. Humans select unconsciously according to what we believe to be the traits that will be selected for by nature. However, if all the offspring were to survive, the biosphere would be so crowded that eventually there would be no room for new organisms. So following the first of Darwin's principles, organisms are capable of reproduction, however the second principle keeps overcrowding from happening.
             Killing thousands of people and animals each
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