People have been using substances to lift their spirits for millennia. Techniques for fermenting beer and related tipples are known from Egypt and Sumeria 4000 years ago, and they soon spread across the inhabited world. Coca leaves (the source of cocaine), tobacco, and caffeine were also popular with ancient cultures.
Humans may even have an evolutionary pre-disposition to seek out narcotics, even though they can be addictive and damaging. Some people may have genes which make them more genetically prone to drug addiction than others. Even some animals - jaguars, lemurs and bees, for example - have a habit of getting high.
Sunday 28 October 2007
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