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However the books were actually written by multiple authors, include stories borrowed from neighboring cultures, sometimes diverge from the best history of the era, and weren’t compiled until long after Moses allegedly lived. Seen in that light, the story of Moses is more than the story of one man; it’s the collective memory of half the world’s people.
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Jewish scholars count 613 commandments (248 do’s and 365 don’ts), with thousands of long-standing interpretations and implications for daily life.
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How curious that one of those commandments ordered Jewish priests to wash their hands—one of the simplest and most effective forms of hygiene ever discovered—right at the moment in history when infectious disease was exploding. And this commandment came just after the part of the story where the Jewish people distinguish themselves as being impervious to plague.
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The flight from Egypt is also the moment in the story when the Jewish people transition from being pastoral herders to urban dwellers. If there is one people who not only made the transition to living in cities but also developed a reputation for thriving in cities, it is the Jewish people. Jewish culture has survived for some 3,000 years—arguably the oldest non-isolated culture with significant permanence—which suggests that it contains features that have allowed it to persist through the Agricultural Age and helped Jews adapt to life in the big city.
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Whether or not early agriculturalists realized it, many ancient cultural practices were adaptations against pathogens. For example, spices have antimicrobial properties, which made them a healthy addition to food in an era before refrigeration. It’s not a coincidence that equatorial ethnic cuisines are particularly spicy (food spoils faster in hot climates) and recipes for meat dishes tend to call for more spices than do vegetable dishes (meat spoils faster than plants). Water in early cities was often filthy, which helps explain the emergence of sterile alternatives such as wine (microbes can’t survive in alcohol) and hot tea (boiling kills microbes). Early people didn’t know that invisible bacteria were causing their cavities, but many still ended up using “toothbrushes”—wooden chewing sticks containing a natural antiseptic or treated with one.
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In reading the Torah, one thing becomes immediately clear: life was rife with disease. Not only does the Torah describe pestilence and plague in a general sense, it also mentions dozens of distinct diseases and illnesses. Yet the Jewish people seem miraculously exempt from pestilence—when they obey God’s laws.
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There’s much in the Law of Moses that remains mysterious or defies a simple explanation, but it is remarkable how much makes sense from a single point of view: infectious disease.
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Some of the rules unambiguously address infectious disease, with priests explicitly playing the role of healer. For example, the laws concerning “leprosy” read like a medical text (Leviticus 13–14). Though the modern condition known as leprosy isn’t itself described, the laws help healer-priests discern between multiple skin diseases and determine the appropriate treatment. The…
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immediate quarantine, washing, and in some cases hair removal. The laws also specify how to deal with “leprous” garments or dwellings. Garments had to be quarantined and washed; if that failed to halt the spread of infection, they had to be burned. Dwellings had to be emptied, contaminated stones had to be replaced, and the walls had to be…
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Far beyond the laws on leprosy, it’s fair to say the Mosaic Law is obsessed with cleanliness, stipulating a lengthy code of personal hygiene and public health—accounting for some 15–20% of the 613 commandments. Though many commandments applied only to priests, the practices often came to permeate Jewish culture, fulfilling the injunction: “ ‘And you shall be to Me a kingdom of priests and a holy nation’ ” (Exodus 19:6). Jewish scholars have written about the importance of ritual hygiene in Judaism for a very long time (it’s one of the oldest themes in…
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The Jewish hygiene code appears to be based on four…
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First, certain people, animals, or things are inherently “unclean.” Inorganic matter alone, such as dirt, doesn’t make someone “unclean” in the literal sense of “dirty.” Uncleanliness comes from organic matter, such as corpses, bodily fluids, insects, and certain animals. In many cases what the Jews call…
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Second, this “unclean” status is transferable through physical contact. In the same way that germs are transmissible, “unclean” things are…
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Third, an “unclean” person or object could become “clean” again through various purification rituals. It was as if these cleansing rituals were able to “…
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Fourth, individual “uncleanliness” affects the entire community. Akin to mandatory public health measures, the Mosaic Law applies to all Jews—and the text makes clear that Jews’ collective adherence to the Mosaic Law…
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However, ineffective rules may have been the price of a generalized obsession with potential routes of infection, and such a mindset would lead to practices that are genuinely hygienic.
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Honoring the dead benefited the living: quick burials make hygienic sense given how rapidly corpses decompose in a hot climate like that of the Middle East.
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Showing a similar wariness of corpses, Jews were not allowed to eat any animal that either died of its own accord or was killed by wild beasts (Leviticus 7:24, 11:39–40). Animals weakened by disease are more likely to drop dead or be picked off by predators, and, as with humans, a corpse lying out for long enough becomes a literal breeding ground for pathogens.
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With so many people dropping dead from disease, cannibalism was a recipe for infection—thus an ancient indigenous method of honoring the dead turned into an unthinkable taboo, used in curses as a sign of the ultimate defilement (Leviticus 26:29; Deuteronomy 28:52–57).
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The result was an ancient form of food inspection: the carcass and internal organs had to be examined for defects, signs of disease, or anything that might have caused the animal to die of its own accord in the near future. Later in history, Jews even inflated the lungs and submerged them in water to look for any leaks—a telltale sign of tuberculosis.
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Avoiding vermin and insects like the plague, as it were, would have been a simple and effective rule to avoid infectious disease.
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The “unclean” lizards and amphibians (Leviticus 11:29–30) are low disease risks, but they do perform a useful function: They eat scads of insects, which carry disease.
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The prohibitions against eating birds of prey appear to follow a similar ecological logic (Leviticus 11:13–19). Birds of prey eat vermin and other pests. Carrion fowl, such as the forbidden vultures, conveniently dispose of corpses (Leviticus 11:13–19), as do four-pawed carnivorous mammals (Leviticus 11:27).
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By excluding cats from the dinner menu, even the American diet reveals the influence of protecting a species that eats vermin.
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Zoroastrianism explicitly stipulated that all human corpses must be taken to a mountaintop, chained to the ground, and left to be devoured by corpse-eating wild dogs and birds (Avesta, Vendidad 6:44–51).
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Any direct contact with an unclean person (or thing) made someone (or something) unclean. For example, if a rodent carcass touched household objects or fell into food or water, it all became unclean (Leviticus 11:32–38). The idea that germs were transferable by even the slightest physical touch may seem obvious today, but it was an astonishing inference thousands of years before the formal discovery of the germ theory of disease in the late nineteenth century.
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As a result of water’s dual nature (easily transmitting uncleanliness, yet itself a source of purification), Jews became fixated on ensuring the purity of their water supply.
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One of those purification rituals requires an unclean person to take both hands and rinse them in clean water (Exodus 30:17–21; Leviticus 15:11; Deuteronomy 21:6).
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Another form of “ritual” purification required Jews to immerse themselves in a pool of water—also known as taking a bath.
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Observing the Sabbath was very important: the penalty for not observing a day of rest—taking a vacation day—was death (Exodus 31:12–17). In preparation, Jews had to undergo multiple purification rituals: take a bath, wash their hands, launder their clothes, and clean their home.
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The Jewish people also knew about at least one form of sterilization: fire.
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Here’s how to make that “water of purification”: slaughter a cow, burn it whole, and throw some “cedar wood and hyssop and scarlet” into the fire. Then take the ashes and add water (Numbers 19). Water, ash, and animal fat are ingredients for soap.
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Even though Jews stopped sacrificial slaughter thousands of years ago, Jewish rabbis offered a different interpretation of “water of purification”: scalding hot water (Talmud, Avodah Zarah 75b). As a result, Jews sterilized their dishes and eating utensils by submerging them in water that had been brought to a boil.
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Earthenware pots, which are porous and difficult to sterilize, had to be broken and could never be used again if they became unclean (Leviticus 6:28, 11:33). In contrast, bronze pots could be scoured and washed (Leviticus 6:28). Items made from wool, linen, leather, and wood could usually be washed (Leviticus 11:32, 13:53–59, 15:12; Numbers 31:20), though sometimes they had to be destroyed with fire (Leviticus 13:47–52).
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(In fact, this passage in Numbers became the basis for many rules governing any type of contact with Gentiles and their possessions, which were assumed to be unclean. This wariness of contact with filthy foreigners, plus an obsession with hand washing, would have given Jews an advantage in commerce, both as middlemen—as hubs in trade networks—and long-distance merchants visiting lands with novel pathogens—key edges in trade networks. Another people similarly distinguished are the Parsis of India; curiously, they are some of the last remaining followers of Zoroastrianism.)
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Not only did the physical plunder have to be cleaned of infection, so did the captive women (all the men were killed). Female captives were forced to shave their heads and trim their fingernails (Deuteronomy 21:10–12),
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Only virgin women could be captured; all other women had to be killed (Numbers 31:15–18). This was a direct result of past experience—see “the Peor incident” (Numbers 25)—when the Jewish soldiers kept all the conquered women alive, had sex with them, and brought a plague upon themselves.
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Early agricultural sex cults—of which there were more than a few—tended to die out. Religions that placed restrictions on our sexual impulses did not.
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The connection between cervical cancer and sexual activity was discovered by observing that celibate nuns were unafflicted by cervical cancer, whereas the affliction was relatively common among prostitutes.
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Follow God’s hygiene rules and emerge unscathed from the great plagues that destroy rival peoples: a sign of God’s favor. Disobey God’s hygiene rules and be struck down by pestilence: a sign of God’s displeasure.
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In Europe, from the Black Death onward, Fishberg uncovered reports of Jewish people dying at lower rates than Christians during major epidemics: a typhus epidemic in 1505; fevers in Rome in 1691; dysentery in Nimègue in 1736; and typhus in Langeons in 1824. By the nineteenth century, public health statistics revealed not only that the effect was real, but that it was enormous: a ten-year advantage in life expectancy in many European cities. This disparity was even more remarkable considering that Jews were often forced to live in crowded and damp urban ghettos—places conducive to the spread of disease.
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