Complex sentence: It is generally believed that Bruce Pearson is too dumb to be able to sucker people, so he is initially excluded; however, Henry begins to include Bruce in the tegwar games as the story progresses.
Split into simpler sentences: It is generally believed that Bruce Pearson is too dumb to be able to sucker people, so he is excluded. However, Henry begins to include Bruce in the tegwar games as the story progresses.