There are no advantages to globalism, just disadvantages and propaganda.
Since going down the globalist route, 80 percent of the population in the western world is poorer. Any wealth gain is concentrated in the top 20 percent, with most of that in the top 5 percent. Globalism has turned international corporations into wealth sucking machines that take money out of an economy but put little back in, selling to it but hiring wage slaves elsewhere so they can keep the profit for themselves.
The crisis we are experiencing right now is a partial consequence of this imbalance, with vast money reserves building up in internationals, but massive deficits in the countries they sell to.