What did the hebrew tradition teach about the responsibilities of the individual and community to combat injustice?

Hebrew tradition teaches that every individual has the capacity to choose whether to be good or to be bad, all have power to decide whether to be evil or to be holy. The tradition also teaches that it the responsibility of each person to fight every form of injustice and oppression and they must help their communities. 

His belief that laws designed to the majority would succeed in aiding minorities as well