In human society, especially, co-operation is an essential ingredient. People need to work together, towards a common purpose, if conflict is to be avoided and progress made.
Non co-operation takes many forms, it is not necessarily blatant. Anything that hinders, or slows down, the daily round and common task can be experienced as a spirit of non co-operation. If a member of a group is slow to act, or lazy, or procrastinates, or allows others to complete his tasks, or fails to do what is expected of him, the other group members will soon feel used or unfairly treated and group cohesion will dissolve. We need to be careful about obstructing others and thereby causing them to become frustrated or embittered.