A major challenge facing both Western and non-Western societies is how best to manage diversity. This challenge is becoming more acute as immigration continues and societies become more diverse in terms of ethnic, religious, and other group characteristics. The historically dominant approach to managing diversity was assimilation, but since the 1960s, multiculturalism has become widely adopted, and even accepted as official government policy in some countries. A central feature of multiculturalism is the celebration of group differences. From a young age, children are being taught to search for and to glorify ways in which their group is different from other groups. The result of multiculturalism has been beneficial for elites among minorities, but detrimental for most members of minorities. The impact of multiculturalism has been particularly detrimental in education. At a global level, also, the celebration of differences has led to wider intergroup rifts and more intense conflicts. Omniculturalism provides a wiser path, one in line with transformational wisdom, starting with the simple observation that genetically and in other important ways, humans are far more similar to one another than they are different. According to omniculturalism, until the age of about 14, children are taught ‘what makes a human being’; the idea of group differences is introduced only after the active ‘celebrating similarities’ step. The omniculturalism path of actively celebrating similarities is a wiser foundation for meeting our common challenges, especially global warming.