Linchpin: Are you indispensable? How to drive your career and create a remarkable future. Linchpin is the word used in the late fourteen century derived from Middle English.    Its meaning is the pin that goes through the axle of a wheel to keep it in place, or A person or thing vital for an organization, or something that holds the various elements of a complex system together.   Means a thing that is essential for organization, house and a country’s strength and prosperity. For example, The monarchy was the linchpin of the nation’s traditions and society. The manager is vital for running an organization. The owner of the house…