The article is dedicated to the consideration of the most important philosophical and religious ideas of modern American theology and Russian philosophy of the late 19th-early 20th centuries. The author scrutinizes the values and concepts of the Pilgrim Fathers and Eastern Christian Patristics in the historical and philosophical context. Special attention is paid to the unity of meanings of Russian religious philosophy and some religious and philosophical concepts of the modern-day USA. The conceptual provisions of American theologians and philosophers C. Gillis, G. Richardson, and L. Gilkey are reviewed. The author considers Russian religious philosophy as a possible basis for unity and peaceful interaction between the two cultures — Russian and American.