To forbid the children of the world from being taught religion by their parents.
They shall all be taken to special child camps, and raised to believe in things like self-respect, respect of others, honesty, integrity, decency, generosity, cooperation, etc.
Afterward, they shall be returned to their parents, who can them attempt to teach them in whatever religion they desire.
...Sounds kind of cruel now that I've typed it out. Hey, never said I was a perfect Emperor of the World. Frankly, I shouldn't even be Emperor of a Suburb.