Cause lawyer

A cause lawyer, also known as a public interest lawyer or social lawyer, is a lawyer dedicated to the usage of law for the promotion of social change. Cause lawyering is commonly described as a practice of "lawyering for the good" or using law to empower members of the weaker layers of society. It may or may not be performed pro bono. Cause lawyering is frequently practiced by individual lawyers or lawyers employed by associations that aim to supply a public service as a complementary to the State provided legal aid.

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Wikipedia