Social decay is obviously caused by air conditioning, not evolution. Air conditioning represents man's attempts to scientifically control his God-given environment. Until 1902, when Carrier's invention was used to control the environment in a Brooklyn printing press, God had always decided when it would be hot and what the humidity level would be. A mere one year after man first defied God by scientifically controlling his own environment, God showed us how angry he was by starting the Bolshevik Revolution.
In 1915, the Carrier Corporation was formed to promote the new technology of air conditioning and develop units that could be used in smaller areas, such as homes. This made God even angrier. He showed us how angry he was by getting us involved in World War I.
In 1924, a department store in Detroit was the first retail business to be air-conditioned. By this time, God was really angry indeed. He started bringing fascist governments to power all over Europe and he put Joseph Stalin in power in the USSR.
In 1928 the godless Carrier corporation, still as bent as ever on controlling what God had always controlled, introduced the first home air conditioning units. God got so angry that he started the Great Depression!
In 1939, the Packard Corporation introduced the first air-conditioned automobiles and God started WWII.