If i had the power to create a civilization, I'd:
1) Use socialism, for quick expansion, without the need for Imperialism and Slavery like UK and USA did. Might be more hard for the my own people, but it would be more righteous and will set an example for generations to come.
2) Separate Church from State... permanently. Politics will not mix with Religion under any condition. Freedome of personal belief is ensured, but once the "propaganda outposts"(churches, religious organizations..etc), it is obvious that another concept will prevail as something old and non-progressive will be forgotten.
3) Eliminate land sale, i would be willing to even allow Free market and moderated buissness, but not land. Land belongs to nobody, we share or we'll be killing each other for it.
4) Each country would be ruled by one kind of party, the goal is to expand nationalized industry and make countries self reliant, opposing policies of big headed dickwads like we have now would only coz differences in countries.
5) Culture in each country would be strongly enforced, soviet style... realistic payments, extermination of commercialism.. the usual.
6) I would totally change the perspective of life and the goals of a common society. Shifting from making a life a simple "obligation" to some guys pocket, to an obligation of society. Every Man's goal should be: working for his family and providing a benefit to his locale..
Yes the planet ruled by me, would be a Stalinist state, with no tolerance to crime and Fair conditions of life for all, instead of great condition for a select few.
The soviets in the 50's thought of a future that looked like this.
And I pretty much would have thought of a same exact world.