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Yet the homogeneity of contemporary humanity is most apparent when it comes to our view of the natural world and of the human body. If you fell sick a thousand years ago, it mattered a great deal where you lived. In Europe, the resident priest would probably tell you that you had made God angry and that in order to regain your health you should donate something to the church, make a pilgrimage to a sacred site, and pray fervently for God’s forgiveness. Alternatively, the village witch might explain that a demon had possessed you and that she could cast it out using song, dance, and the blood of a black cockerel. In the Middle East, doctors brought up on classical traditions might explain that your four bodily humors were out of balance and that you should harmonize them with a proper diet and foul-smelling potions. In India, Ayurvedic experts would offer their own theories concerning the balance between the three bodily elements known as doshas and recommend a treatment of herbs, massages, and yoga postures. Chinese physicians, Siberian shamans, African witch doctors, Amerindian medicine men—every empire, kingdom, and tribe had its own traditions and experts, each espousing different views about the human body and the nature of sickness, and each offering their own cornucopia of rituals, concoctions, and cures. Some of them worked surprisingly well, whereas others were little short of a death sentence. The only thing that united European, Chinese, African, and American medical practices was that everywhere at least a third of all children died before reaching adulthood, and average life expectancy was far below fifty.14 Today, if you happen to be sick, it makes much less difference where you live. In Toronto, Tokyo, Tehran, or Tel Aviv, you will be taken to similar-looking hospitals, where you will meet doctors in white coats who learned the same scientific theories in the same medical colleges. They will follow identical protocols and use identical tests to reach very similar diagnoses. They will then dispense the same medicines produced by the same international drug companies. There are still some minor cultural differences, but Canadian, Japanese, Iranian, and Israeli physicians hold much the same views about the human body and human diseases. After the Islamic State captured Raqqa and Mosul, it did not tear down the local hospitals. Rather, it launched an appeal to Muslim doctors and nurses throughout the world to volunteer their services there.15 Presumably even Islamist doctors and nurses believe that the body is made of cells, that diseases are caused by pathogens, and that antibiotics kill bacteria.
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