Raising tariffs only blocks trade for those countries themselves. The world is now so globalized that any country increasing tariffs isolates itself and ends up doing harm to its own economy.
Block were predicted by Lenin, in his booklet: Imperialism, the Newest Stage of Capitalism, written by Vladimir Lenin in 1916.
We are now in the block epoche.
War is the predicted outcome.
He did not know much about physiology, he would know that socialism is not possible as humans don't change easily.