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HLTB21H3 Lecture Notes - Thomas Robert Malthus, Becoming Human, Jared Diamond

Health Studies
Course Code
Caroline Barakat

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Chapter Two: Plagues, The Price of Being Sedentary
Becoming Human, Becoming Parasitized
-A change in environment in the past (from trees to the ground place), freed them from
some disease but allowed for t he acquisition of new ones
oi.e. from ground bugs biting them
-Climate change and technolocal advancements (tool making) – new infections
oDomesticating animals
-Zoonoses – animal infections transmitted to humans
-When populations emigrated Africa – the vectors (mosquitoes, f lies that transmit disease)
stayed in Afr ica
oEven today there are diseases that remain in Afr ica
-Tool making and tool use made hunting possible – further increasing size of population
-Hunter-gatherers were forced to roam over large distances and lived in small populations
did not come into exposure with parasites that much
oRelatively healthy
The Road to Plagues: More Humans, More Disease
-Thomas Malthus A population that is unchecked increases in geometric fashion
oThere are factors that will eventually bring population growth to a halt
oIf population goes unchecked – lead to starvation, disease and war
-Two kinds of check to set the upper limit external or environmental factors and self-
regulated factors
The Effect of Agriculture
-Change from hunting and gathering to farming has been termed agricultural revolution
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