The EU is the UK's biggest trading partner, but that didn't stop us leaving after we were already in (sadly). There's a long history of people overestimating t

The EU is the UK's biggest trading partner, but that didn't stop us leaving after we were already in (sadly). There's a long history of people overestimating the importance of economic considerations in international relations. See e.g. all of the people who thought that the First World War couldn't happen because it would be an economic disaster. Turns out that it did, and was.