And you have to remember, people weren't going from being independent to being subjugated in most cases. Even before the conquest of Islam, they were probably subjugated by a king or part of an empire, like the Byzantine Empire or the Persian Empire. And so they're really switching from one conqueror to another, and oftentimes people are hopeful that the new conqueror might be better than the last. Oftentimes they're proven wrong. Sometimes it might actually be the case. And so there might have been some support that allowed it to spread this quickly. And there's also worldly motives.