If the over all culture of people is selfish, the culture of team work may be lacking.
Ability to work by forming teams requires to be taught in schools.
Team work requires one to give priority to Team's objective and to put personal interests on second level.
Where there is no team culture, people may be giving first priority to personal interest and second priority to common interest.
(C)Haresh Raichura - Lawyer in Supreme Court; On twitter @hareshraichura; Profile on LinkedIn