What positive impact has Mr brown has had on the people of Things Fall Apart?

Reverend James Smith is Mr. Brown's successor to the church of Umuofia, after Mr. Brown is forced to leave for Europe due to ill health. Mr. Smith is a much more zealous preacher of Christianity, and is much more of a punishment/reward type of preacher. He openly dismisses the Igbo culture as barbaric.

Eventually he tries to protect Enoch in the church after Enoch kills an egwugwu. As a result, the tribe comes to the church. Despite Mr. Smith's protestations, the tribe burns the church down.