Board Thread:Questions and Answers/@comment-30715799-20170524160013/@comment-26383377-20170530064547

That's true. Plus, it's another safeguard against corruption. If one Inquisitor had control over other inquisitors, he'd really mess with the imperium if he turned to chaos. The division also encourages a sense of competition between the inquisitors, which naturally brings forth better results. Well, "better" according to the inquisition.