Napoleon Hill's Think & Grow Rich was the best-selling self-improvement book of 1937. This book has been crucial to the success of numerous people, and if you ask high-performing and successful lifelong learners, they have most likely read it. In chapter seven, Hill concisely lists the major causes of failure. He later increased the number of items on this list to 54. In this article we will be looking at the 12 Major Causes of  Failure in career. If we are aware of these, we may be better equipped to combat them if and when we find ourselves in their position.