[1] His 1974 presentation at the Congress for World Evangelization in Lausanne, Switzerland – an event organized by American evangelist Billy Graham – was a watershed moment for global mission.

When World War II broke out, Ralph was too young to enlist, so he studied for just two and a half years at Caltech and earned his B.S.

[7] It was during Ralph’s era at Fuller Theological Seminary that he created the E-Scale evangelism which was one of his greatest contributions to global missions as this change the missionary outlook from focusing on countries to people - groups within nation-states.

The idea behind TEE was to make it easier for local church leaders to learn and be ordained as ministers without relocating them and their families for years to the capital city to attend seminary.

Donald McGavran at Fuller Theological Seminary's School of World Mission was so impressed by the TEE education and other writings by Ralph, that he asked Winter to join the faculty with him and Alan Tippett, a noted anthropologist.

It was also in these years that he founded the William Carey Library, (now, William Carey Publishing) which publishes and distributes mission materials; co-founded the American Society of Missiology; launched what is now the Perspectives Study Program (first called the Summer Institute of International Studies); and presented the idea of the "hidden peoples," which later became synonymous with the phrase "unreached peoples," at the 1974 Lausanne Congress in Switzerland.

After the 1974 Lausanne Congress, Winter and his wife Roberta felt there needed to be a place to tackle cultural and linguistic barriers hindering the sharing of the Gospel with all peoples.

In 1976, Winter left his secure, tenured position at Fuller Theological Seminary to focus on calling attention to the unreached peoples.

Tokyo 2010 brought together around 1,000 mission leaders to discuss the unfinished task of reaching the world's remaining least-reached peoples.

Steve Richardson argues that Winter "effectively reframed the unfinished task and the church's understanding of the Great Commission in terms of reaching unreached ethnolinguistic people groups.