Want this question answered?
The reasons groups of people move to a particular place, known as pull factors, include availability of jobs, availability of food, better living conditions, education, better medical care, security, family links, the promise of political freedom, the promise of religious freedom, and land.
Some people might move because of the pull factors pulling them toward that place. They might also move because of the weather conditions where they live.
The reasons groups of people leave a particular place are called push factors. Push factors are usually due to a difficulty such as war, natural disasters, food shortages, or inability to find jobs.
Groups of people who move from place to place are known as nomads
Barbarians, or savages.
A union between countries or groups of people is known as an alliance. This can be military alliances, along with economic or even social unions.
interest groups
The French
In US they are known as 'lobbying groups'
epidemiological studies.
gentleness
In US they are known as 'lobbying groups'