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the columbian exchange (disease (from the americans to the europians…

- - - - 50-90% of natives died
      - just killed
      - destabilisation
        
        when a ruler is killed by a disease then the place they are ruling over destabilised
        
        the fighting also lead to the spread of disease because of the contact with blood.
  - - - std spread by sailors because they slept with many people throughout their travels.
    - - cigarettes kill
- - - - helped transportation
    - - helped with farming
    - - helped with farming
  - - - sweat potato
      - chilis
      - tomatoes
      - chili
      - corn
      - beans
      - potatoes
      - avocados
      - peanuts
      - blueberries
      - manioc cassava