Social security systems provide social insurance and social assistance to populations. Social insurance is funded through mandatory contributions from employers and employees, with major contributions also made by governments and employers. It provides benefits as a right to those unable to work due to risks like unemployment, sickness, or other emergencies. Social assistance is funded through general government revenues and provides subsistence support without means testing to those in need. The document compares and defines social insurance and social assistance as methods for providing social security and support to populations.