Abstract
Characteristic features of Christianity of the twentieth century were the consolidation of his denominations around social problems and holding inter-Christian theological and missionary conferences. These components of Christian history of the last century are connected with ecumenism. Ecumenism, in turn, influenced the initiation of a dialogue between Christianity and other religions, most notably Judaism and Islam. Thus, a comprehensive study of ecumenism will not only enable us to better understand contemporary Christianity and try to predict further ways of its development, but also on the basis of it to understand the inter-religious dialogue, which largely depends on the future of the world community.