By Rainer Zitelmann Dr Rainer Zitelmann is a German historian, sociologist and author. His latest book is The Power of Capitalism. In our exclusive series, Zitelmann reveals a compelling body of evidence that capitalism and market economies have lifted billions out of poverty. Today, he writes on Venezuela. In the course of the 20th century, Venezuela went from being one of the poorest countries in Latin America to becoming the richest. In 1970, it ranked among the 20 richest countries in the world with a higher per-capita GDP than Spain, Greece and Israel, and only 13 per cent lower than the …