Wow. Who knew? Trade is highly beneficial... 
"More trade has real costs, but the benefits are vastly greater. For rich countries, the benefits outweigh costs 7x. For the world's poorer half, benefits are an astounding 95x higher."

https://www.cambridge.org/core/journals/journal-of-benefit-cost-analysis/article/benefitcost-analysis-of-increased-trade-an-orderofmagnitude-estimate-of-the-benefitcost-ratio/C1B297FFD1062F9DEA69794B8C123204