Congressman Sherrod Brown in Myths of Free Trade: Why American Trade Policy Has Failed discusses 7 free trade myths:

1) Americans believe in free trade.
2) Free-Trade agreements are necessary to fight the war on terrorism.
3) Free trade is an extension of American values abroad.
4) Free trade leaves most people better off-in rich and poor countries alike.
5) Free trade will bring democracy, human rights and freedom to authoritarian regimes.
6) The North American Free Trade Agreement has been a success.
7) Free trade is a great American tradition.

I add an eighth myth that free trade has no detrimental effect on the environment.

Globalization means a concerted effort to reduce tariffs, red tape and subsidies that are impediments to world trade. This effort got started at the United Nations Monetary and Financial Conference at Bretton Woods, New Hampshire in July, 1944. Delegates from all 45 Allied nations met to regulate monetary, financial and trade barrier reduction. The common feeling was that the high tariff walls erected in the 1920s and 1930s had a significant role in bring on the Great Depression which brought the Nazis to power. The Allies were determined to avoid another world war. Increasing prosperity for all seemed like a good way of doing that. The Bretton Woods Conference, as it came to be known, created two institutions, the World Bank and the International Monetary Fund.