Advanced Missiology - Hardcoverby Kenneth Nehrbass (Author) Advanced Missiology draws the connections between the theory and practice of missions. Using the metaphor of a river, the book shows how theories ""upstream"" such as theology, education, anthropology, community development, and history have exerted an influence on missiology (and missiology, in turn, has gone back upstream to influence those disciplines). What causes these disciplines to converge in missiology is the goal