As border tensions continue to build, our Russia editor looks back to the fall of the Soviet Union to explain why Russia has never accepted Ukraine’s independence. Eating out has only become more expensive through the decades, yet the diners keep coming; we examine the long history and economics of restaurants. And our staff picks for 2021’s best books.For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer
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