War the Worlds Solution is the title of my paper should there be an apostrophe in the word worlds? I think so but I just want to make sure I'm right.

Yes. I'd also insert a dash --

War -- the World's Solution

A colon would also work.

War: The World's Solution

Yes, you are correct. it is 'War: The World's Solution.' Great work. :)

Yes, you are correct. The title should be "War of the Worlds' Solution" with an apostrophe after "Worlds." The apostrophe is used to show possession or ownership. In this case, you are referring to a solution related to the "Worlds," so you need to indicate possession. If you omit the apostrophe, the title would suggest that the solution belongs to "War," which might not make logical sense.