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        Biology and History 
          inform one another:
 "Rapid, massive, and not necessarily benign change has crashed back into our minds as a crucial factor in our lives, societies, world, and universe." 
          
            Crosby, Germs, Seeds, & Animals. p. 183.  Competitive exclusion | Invasive species | Food stuffs | Women & Labor | Conclusion The case of Columbus in the Americas, 1492-1517 
          
            Is character 
              (behavior, beliefs and faith) or material culture more important to 
              the success of a society, the growth of its population and the cultural materials that
              it adopts? "My dour view of the biological side of European imperialism is not, of course, popular with the mass public. . . ."  Crosby, p. 181.  Colonization, and the ecology of invasions can best be explained in history by a biological perspective utilizing: island 
              biogeography, geographical epidemiology, ecosystem theory, and genetics to yield a fuller dimension 
            to the revolutionary and enduring character of the Columbian 
                exchange.
 The biological factors that explain the "demographic takeover" are: 
          
            
              
                1, 2, 3, 4,   Focus questions.   Competitive exclusion 
          principle:
 
           
            
              Creatures "must not only excel in the struggle 
                  for existence, they must also adapt themselves to meet new conditions 
                and still win out over their competitors."
 (Storer, p. 98) "No two species can occupy the exact same niche over time without 
                one giving way to the more adapted or more numerous species." 
                 (Dasmann, pp. 78-79 [1984]) Any exotic species will crowd out a native species when it is introduced 
              and occupies the same niche as the endemic species that it replaces since it lacks predators which prey on the the native species.
 Competitive exclusion | Invasive species | Food stuffs | Women & Labor | Conclusion    Invasive species, 
 
        
          Consider the spread 
            of: 
            Pigs, Rats, Cattle, Sheep & Goats affected crops and native plants and spread European weeds like blue grass and dandelions, bees, & pathogens.  Crosby, pp. 37-38.  Asian materials, Horses (the steppes), wheat (Iraq), and sugar cane (Papua New Guinea via India) African materials, gourds, coffee, and Guinea fowl (Chickens)
 Competitive exclusion | Invasive species | Food stuffs | Women & Labor | Conclusion 
              
 Food stuffs, 
            material culture: 
            Old World 
              Onions, cabbage, 
                rice, grapes, sugar cane, coffee, wheat, rye, oats, barley, lamb, pork, 
                beef, lentils, peas, garlic,  apples, citrus, and truffles.  New World 
              Corn, potatoes, 
                squash, beans, tomatoes, chiles, cassava or yucca, avocados,  cocoa – chocolate, coca, 
                agave, turkey, pineapples, melons, amaranth, tobacco, cotton. 
 Depicted by Diego Rivera in this painting of a Native American person, a common task of grinding maize into tortillas reveals the importance of women to the stability of Mesoamerican populations. 
                Focus questions. Competitive exclusion | Invasive species | Food stuffs | Women & Labor | Conclusion   
             Arabs 
              brought written numbers, alchemy, 
              and algebra, a horse culture, sugar cane, books, fermentation of sugar into alcohol,  besides clocks, glass, ceramics. "Greek fire", gunpowder, cannons, silk and paper to Persia and the middle east, north, east and west Africa, southeastern Europe and Spain.
 How do you know that both material culture and ideas or beliefs work together to form a society's national character? 
           Ecological Invasions | Germs, Seeds, & Animals | Crosby: Imperialism           
 Using character 
              (behavior, beliefs and faith) and three examples or more of material culture explain the important to 
          the success of a society, of food to the growth of a population and the effects of demography on European and Asian nations after Columbus.   |