<span>The value of stock on the New York Stock Exchange fell by a fifth from its peak in 1929
</span><span>Businesses closed their doors, factories shut down
</span><span>The banks failed and most Americans lost their savings and investment
A quarter of Americans were unemployed</span>
Evolutionary
An evolutionary perspective is when a person looks at the human mind and human behavior and attributes it to an evolutionary survival adaptation. In this case, the professor believes that it is an evolutionary advantage to pair-bond.
There was more interest and curiosity with led to discovery.
