Even if 80 percent of the population of a country are Christian believers, they will have almost no cultural influence if the Christians do not live in cultural centers and work in culture-forging fields such as academia, publishing, media, entertainment, and the arts. The assumption that society will improve simply be more Christian believers being present is no longer valid.
Timothy J. Keller, Center Church: Doing Balanced, Gospel-Centered Ministry in Your City
evangelism, influence