People is a collective noun for a group of human beings. The people can be of different cultures, nationalities, belonging to rural areas, or urban areas. People of scientific community behave differently as compared to people of accounting. People of performing arts and cultural activities have a completely different approach to life as compared to technologists or politicians. People of different regions speak different languages. A language generally segregates people into different groups.
People who work in a factory on the shop floor have a different approach to life and behaviour as compared to those in the office or white collar people. When there are elections people belonging to politicians and supporters, are different as compared to the public.
Children are a different set of people as compared to their parents. All of them live in the same location. People belonging to North of India have a different style, culture and facial features as compared to the South. People from East of India, like China, Korea, Japan are quite different in their appearance and traits as compared to the Western people in USA, and Europe.
So there are many different types of people. In terms of psychology and behaviour, there are good people, saints, ordinary people, selfish people, cheats, robbers and terrorists.
Thus people of this world are of different types, according to their geographical location, ancestry, jeans, intelligence, behaviour, family and nature. But all human beings share the same physiological body structure, share some social behaviour, have some known traits, talk some language, face a common fate and share same natural resources like oceans and atmosphere. When people of one category benefit, other people can also benefit or can lose some thing. There is a strong dependency among different people. All people of all types must cooperate for the common good and progress of the human race.