In 1949 Bob Luitweiler founded the first hospitality service called Servas Open Doors as a cross-national, nonprofit, volunteer-run organization advocating interracial and international peace. In 1965 John Wilcock set up the Traveler's Directory as a listing of his friends willing to host each other when traveling. In 1988, Joy Lily rescued the organization from imminent shutdown, forming Hospitality Exchange. In 1970 U.S. President Jimmy Carter announced the formation of Friendship Force International, which has chapters in 57 countries today.The concept of hospitality exchange, also known as "accommodation sharing", "hospitality services" (short "hospex"), and "home stay networks", "home hospitality", refers to centrally organized social networks of individuals, generally travelers, who offer or seek accommodation without monetary exchange. These services generally connect users via the internet.