In human geography,<unk>  is the process outlined in William H.<unk> 's book Plagues and Peoples. The process described concerns the role of microbial disease in the conquering of people-groups. Particularly, it describes how diseases such as smallpox, measles, typhus, scarlet fever, and sexually-transmitted diseases have significantly reduced native populations so that they are unable to resist colonization.
McNeill's law
Lightwood's law
Bell–Magendie law
Ribot's law
Hy's law
Ryan's Law
Farr's laws
Sutton's law