People who feel good about themselves, deal effectively with life's challenges, and have positive social relationships are known as

I believe the answer is: psychologically healthy.

People that are psychologically healthy. generally have a high satisfaction with their own life. This positive outlook would benefit them because it make them look sociable and attract a lot of people to form a group that would bring out the best from one another.

The london company was an english joint stock company established in 1606 by royal charter by king james i with the purpose of establishing colonial settlements in north america.