Hadhrat Mirza Tahir Ahmad (rh), the 4th successor of the Promised Messiah (as) delivered a lecture on February 24, 1990 at the Queen Elizabeth II Conference Centre in London. The lecture, with the above title, was later published in 1992. The central theme of the lecture is peace in this world. In the world which suffers today from violence, bloodshed, conflict, wars, violation of Human Rights, socio-economic exploitation of the third World and everything which violates peace and creates discord, we need peace more than anything else. He talked about (i) Inter-religious peace and harmony (ii) Social peace, in general (iii) Socio-economic peace (iv) Economic peace (v) Peace in national and international politics and (vi) Individual peace.