The Ottoman Empire was once among the biggest military and economic powers in the world. So what happened?At its peak in the 1500s, the Ottoman Empire was one of the biggest military and economic powers in the world, controlling an expanse that included not just its base in Asia Minor but also much of southeastern Europe, the Middle East and North Africa. The empire controlled territory that stretched from the Danube to the Nile, with a powerful military, lucrative commerce, and impressive achievements in fields ranging from architecture to astronomy. But it didn’t last. Though the Ottoman Empire persisted for...