It might have been that once the Earth started to warm, some animals weren't able to adapt. Or possibly because new needs had to be met, so they found new animals to domesticate that could help with the new situation.
Here are the order of occurrence during the progress of the early humans:
1. They were able to domesticate various animals.
2. Agriculture was developed further by farming.
3. They were able to discover more fertile lands for growing animals and plants.
4. More and more people started to join them on their lands in order to develop more organized communities.
5. They settled down in order to developed societies with rich agrarian resources.
Answer:
The Roosevelt corollary was an addition by President Theodore Roosevelt to the Monroe Doctrine. According to the Monroe Doctrine, Europeans could not intervene on the American continent; the Roosevelt Corollary provided that the United States had priority to intervene against foreign interventions.
The Roosevelt Corollary was theorized after Germany and the United Kingdom threatened an armed intervention in Venezuela in 1902 due to financial issues, only to submit to the Permanent Court of Arbitration, under pressure from Roosevelt himself, and after thirty-two countries claimed the payment of $ 32 million in debt from the Dominican Republic.
