Harvey is a retired engineer, and author of " href="https://whatcomesafternations.com/" target="_blank"What Comes After Nations" and a regulator contributor to BahaiTeachings.org, a platform that allows individuals to share their personal perspectives and insights as they strive to implement the Baha#39;i teachings in their everyday lives. In the interview Harvey provides a very good explanation on the Baha'i concept of Progressive Revelation, which is basis for his book.