What did Muhammad do?

Muhammad (peace be upon him)/pbuh was the last Prophet of Allah who preached the monotheistic religion, Islam. Muhammad pbuh was a man who was perfect in all aspects whether his habits, his speech and his actions and it is him whom we Muslims are told to follow. His conduct even with his bitterest enemies was astonishing. e.g: After years of mockery, deceit, torture (physical and mental), waging wars against Muslims, banishments and other oppositions, Muhammad pbuh forgave everyone when he conquered Mecca peacefully i.e: it was a war, won without fighting or any resistance.
He was revealed the Quran in the span of 23 years as a source to guide humanity till the end of time. And by the Grace of Allah, the Quran (with all due respect) unlike the Bible or Torah hasn't been changed since the last 1400 years. every letter is the exact same as it was revealed to the Prophet Muhammad (s.a.w). So this is a point to be noted here. Where the Torah and Bible were corrupted by Popes and the church officials only within the first few 100 years of their revelation, the Quran hasn't! And for the people who claim that the Quran was text, written down by Muhammad (s.a.w), just read it once and then tell me that can such depth and knowledge be penned down by a man? Obviously NOT.
As for Muhammad (s.a.w), he brought forth (by the Will of Allah) one of the greatest expanding religions of all time. Not only that, he told us to refrain from evil deeds (violence, usage of intoxicants, illegal sexual intercourse etc..) and now, after 1400 years, science is beginning to agree with what Muhammad (s.a.w) told us to do centuries ago.
See for yourself at : http://tiny.cc/p3y5p

I would love to answer any other questions regarding Islam. :)