Remember what a dump the UK was back in 1973 before we joined the EU
Of course this was not all to do with the EU, but the attitudes have changed a lot, from a largely failing inward-looking country to a creative outward-looking one. The migration of people to and from the EU helped in this change. We have had a flood of creative, hard working people entering the UK contributing towards our academic, business, financial, sporting, artistic and high-tech sectors. Please let us not go back - we were not great then at all.