I'm Very Worried About the Global Economy

I am very worried about the global economy in the next few months. First of all it has been 8 years since we had an economic recession in America. Historically we had them every four to seven years. There are many problems in the world economy. Donald Trump has promised a tare war with Mexico, China, Korea, Japan... If he does that, my God, we are going to have serious problems! (iShares MSCI Japan ETF(EWJ), iShares MSCI South Korea Index Fund ETF (EWY), iShares FTSE/Xinhua China 25 Index ETF (FXI))