I find this to be one of the most disturbing verses in the Bible, and it has everything to do with how we should pray for unreached people groups (UPGs). Find out what is an important step to take and an essential mindset to have when praying for unreached peoples.

Ralph Winter addresses the issue of contextualization in frontier missions work and how we may underestimate the cultural shifts necessary for effective work at the frontiers.

Ralph Winter addresses the issue of over-optimism in frontier missions work and how we can make things seem too simple or easy.

Ralph Winter addresses the issue of moving targets in frontier missions work and what it means for us to fail to notice massive changes in a situation on the ground.