The Prophet Muhammad was sent by Allah as a mercy to all worlds. This is evidenced by verses in the Quran where Allah says "And We have not sent you except as a mercy for the worlds." The Prophet himself said "I was only sent as a mercy." This document explores the universal mercy of the Prophet through Islamic scripture and teachings, showing how mercy was central to his message and how he embodied mercy in his character and teachings which aim to establish a just, compassionate and sustainable social system.