Harmony within diversity must be nurtured and cherished. As we know people nowadays always talk about the harmony of the country but not all of them know what is the meaning of harmony within diversity in the country. Based on the Oxford Dictionary, the harmony is defined as a state of agreement or of living together in peace. Meanwhile the diversity means a range of a many people or things that are very different from each other. So, we can conclude that harmony within diversity is an act of living together with many different ethnic and races in peace and good without any racism and problems that can lead to the collapse of a country or state. This is important for us in order to create peace environment in our country. Back there, a“black hole” had occurred in this country where people from different ethnic were killing each other. This incident happened on May 13 of 1969 and has been one of the most-remembered dark history as it ruined out in the capital city of Malaysia which is Kuala Lumpur. Ethnic violence also occurred in a few other locations and states around Malaysia. As we already know, at that time Malaysia was a plural society which created by British colonial economics policies, with a population of 56 percent Malay Muslim, 35 percent Chinese Malaysians, 8 percent Indian Malaysians and one percent others. Although the conflict was localized and successfully contained, the aftershock was felt throughout the country. It became a crisis event in political