Philosophy, as they say, is the study of life itself. It is the study that looks to answer the questions relating to our existence, our minds, knowledge, reasons and values. It is very different from other forms of reasoning as it involves a lot of critical thinking, analysis and is also highly systematic in its approach. Today philosophy has evolved into a discipline that is studied and taught at institutions of higher learning. The beginnings of philosophy can’t be traced to any particular place or person but there are many ancient philosophers who have given shape to what philosophy is today. Some names among those are very well known while others are not. However, their contributions have helped in better answering the questions about life in a simple way. Here are ten greatest philosophers of the ancient world.