Greece’s combative finance minister, Yanis Varoufakis, who took a strong stand in demanding that creditors write off some of his country’s debts, abruptly resigned on Monday morning. Mr. Varoufakis had played a central role in rallying votes for a resounding no on a referendum on Sunday that asked Greeks whether they were willing to accept an arrangement with creditors that would require considerable further austerity, such as pension cuts. Mr. Varoufakis had threatened last week to resign in the event of a yes vote, and his decision to step down after he and his allies prevailed in the referendum was unexpected. His resignation appeared to be the first move at conciliation toward Greece’s creditors […]