Leaders of  $100 million family businesses say they and Britain are conditionally better off in the European Union in the week of the controversial referendum. An overwhelming 75% of principal owners, chief executives and trusted advisers said the United Kingdom should stay in the EU, in our exclusive survey of the global Campden Wealth community. “A strong united EU is needed for world peace,” a Remain-voting, Europe based principal of a $500 million to $1 bilion family business said.