In law it is called reciprocity. What we sow is indeed what we reap. Interdependence means individually assuming responsibility for any condition that is contrary to the quality of humanness in its highest form and then acting to produce, out of the condition or situation, balance and harmony for all. That is not to say that we take up causes and then shove them down someone else's throat. It is to say that we can work in harmony through example and right action to produce an environment that is loving and nurturing for all.
Many people operate in a codependent manner.
Codependence is manipulating another person to provide you with security, sensation, and power. A codependent is a victim, a victim both of his or her surroundings and of other people. The need to control another person is a classic symptom of codependency. Codependency grows out of insecurity. All insecurities are externally oriented.