This article is devoted to the history of the World Congress of Families (WCF) and its interaction with Russian partners. The article begins with a story about Allan Carlson’s trip to Moscow in 1995, where as a result of a meeting with sociologists, the idea of creating a WCF was born. The author then analyses the cooperation between the WCF and the Russian Orthodox Church as an example of so‑called “conservative ecumenism,” which partly replaces classical, more liberal ecumenism, such as that presented by the World Council of Churches.