How did John Hawkins interact with the indigenous people he came in contact with on his journey?

The idea that desirable traits can be bred into human beings and undesirable ones can be bred out is known as:

How can changes in technology or consumer demand make it difficult for people to get jobs? by changing the number or kind of jobs available by making it possible for some people to work fewer hours by making it difficult for people to buy what they want by creating a demand for things that are not available

Describe briefly about great sunil tiwari