Also! If you want, you can give an explanation in the comments why you think that victory is the easiest. (Note: All of you comments are opinion and I don't want anyone fighting over their own opinions down here, so if so if you disagree with another persons opinion then just agree to disagree with them, ok?)

In my opinion the Science victory is just too easy, I have won more science victories than any other victory type. (Frederick Barbarossa, Pachahuti, Joao lll, and Robert the Bruce are all the leaders i've won a science victory with.