In the two months since Russia invaded Ukraine, the silence — and even acquiescence — of the Russian elite has started to fray. Even as opinion polls report overwhelming public support for the military campaign, amid pervasive state propaganda and new laws outlawing criticism of the war, cracks are starting to show. The dividing lines among factions of the Russian economic elite are becoming more marked, and some of the tycoons — especially those who made their fortunes before President Vladimir Putin came to power — have begun, tentatively, to speak. For many, the most immediate focus has been their...