Why did the United States Canada and Mexico sign the north American free trade agreement?

The North American Free Trade Agreement is important because it is one of the first steps to globalization. Free trade causes companies to ship jobs and products out of the us without taxes as aforementioned. This is taking jobs and money from Americans and putting it in the hands of wealthy corporation owners and to other countries GDP. There is an ultimate goal to globalization and that is to make every country of as one aka to end geopolitical sovereignty and to write a new constitution for the world under rule of law by the UN. According to our constitution this is treasonous behavior yet almost every politican has helped this agenda along for the past 75 years. Please search globalization and find out what is really being done. Also google bush, Clinton, Obama new world order speeches, and presidential warnings. Educate yourself.