Free trade essay?

I need to write an essay discussing the arguments for and against free trade but I need help, I'm stuck on the intro part.

Moi !! C'Est MOI..2015-06-14T22:36:26Z

Free trade is a policy in international markets in which governments do not restrict imports or exports. Free trade is exemplified by the European Union / European Economic Area and the North American Free Trade Agreement, which have established open markets.
Canada, The United States, and Mexico have such a treaty of Free Trade, as does Europe with its associates.