For nearly half a century, Russian poet Yevgeny Yevtushenko has been “a piercing voice of conscience, sometimes bitterly angry, other times overflowing with enthusiasm and hope. Many Americans see him as part Walt Whitman and part Bob Dylan; Russians know him as a wildly popular poet who embodies their country’s spirit and has often screamed truths that others feared to whisper. His fame has spread far beyond his homeland, and today he is among the world’s most widely admired living writers.” And now he’s in Tulsa…