Essays

2026

• Feb 27. Peak Islam

2025

• Sep 26. Gospel Gap: Uttar Pradesh
• Sep 12. Gospel Gap: Algiers
• Sep 05. Gospel Gap: Somalia
• Aug 29. Gospel Gap: Eritrea

2023

• Jan 01. How long to reach the goal?

2022

• Sep 01. Over 1% of the World: A Macroanalysis of 1,967 Movements
• Apr 12. Global Movement Dashboard
• Feb 01. Unreached is not unevangelized is not unengaged

2021

• Sep 01. Urbanization and measuring the remaining task

2020

• Nov 01. 1% of the World: A Macroanalysis of 1,369 Movements to Christ
• Jun 24. Why Rapid Growth Declines as Movements Grow in Size

2019

• Dec 06. How Movements Count

2018

• Jan 01. The Brutal Facts

2006

• Sep 01. What it takes: more than churches
• Mar 01. The Celtic Missionary Movement