Standing at a Greek site where democracy was conceived, French President Emmanuel Macron called on members of the European Union to reboot the 60-year-old bloc with sweeping political reforms or risk a “slow disintegration.” Macron, on a visit Thursday to Athens, urged EU nations to carry out six-month national reviews on EU reforms before imposing them, signalling his distance with the German-backed approach based on fiscal discipline within the euro zone. “It would be a...