Very few parts of Russian society have drawn more interest than the so-called “oligarchs.” These are incredibly wealthy men with political connections to Putin’s inner circle because, in the totalitarian kleptocracy that is Russia under Vladimir Putin, if you don’t have political ties to Putin’s inner circle, wealth doesn’t bring you power; it brings you a one-way trip to a Siberian labor camp. The first generation of Russian oligarchs emerged from the 1991 collapse of the Soviet Union, whose state control over the economy began to loosen under Mikhail Gorbachev’s perestroika, or restructuring reforms. Gorbachev’s successor as president, Boris Yeltsin,...