Why is Jarvis's death considered a terrible loss for South Africa and for the church?

Arthur Jarvis clearly wanted to make a difference for blacks in South Africa. James Jarvis learns more about the social work that Jarvis did on behalf of South Africa and eventually devotes himself to promoting social justice in South Africa. James Jarvis later befriends Stephen Kumalo when they meet by chance while Kumalo delivers a letter. Although a conservative man, James Jarvis eventually devotes himself wholeheartedly to social progress, donating ten thousand dollars to start the Arthur Jarvis Club, donating milk from his estate to help starting children during the drought and arranging for a dam to be built in Ixopo to prevent further droughts.