USA Today has selected the 25 most important trends since 1982. The top 10 are 1) Diversity, 2) Fighting for equality, 3) Millions living longer, 4) Globalization, 5) Global warming, 6) Gay rights gain ground, 7) Fear of terrorism, 8) Snuffing out smoking, 9) Obesity crisis, 10) Tech creates the cult of 'me'. Check out the rest of the list here.