Answer: Prince Vladimir arranged mass baptisms in Kiev. :Princess Olga converted to Roman Catholicism and : Missionaries from Constantinople came to Russia.
Explanation:
The Maryland Society for Promoting the Abolition of Slavery and the Relief of Free Negroes and Others Unlawfully Held, was founded in 1789. I am pretty sure this was the first open abolitionist group. Hope I helped. :)
The United States and Great Britain established the boundary line in the Oregon Territory at the 49th parallel. True.
The Enlightenment thinkers changed peoples' beliefs of how government should work by talking of separation of powers and checks and balances.