Here’s an interesting quote about Europe:
Those who would pull us out of Europe must come to terms with the damage that would do to our people. Even the threat of withdrawal destroys jobs. Firms that invest in the Europe often decide to come to Britain. Eurosceptics’ threat to withdraw makes companies hesitate to look elsewhere. That Eurosceptic threat is losing us jobs now.
Margaret Thatcher. She attacked the then Eurosceptic Labour Party in almost exactly those words when Prime Minister. (I’ve just swapped Eurosceptic for Labour and one mention of Common Market for Europe.)