What is the origin of the idiom "big wheel" and when to use it?

The origin of the idiom "big wheel" can be traced back to the late 19th and early 20th centuries in the United States. It emerged during the era of industrialization and the rise of large corporations. The term "big wheel" metaphorically refers to the large, prominent wheels found in machinery and vehicles. These wheels played a crucial role in powering and driving the machinery forward. Similarly, in the business world, a "big wheel" represented someone who held a position of power, influence, or importance within a company or industry. The idiom became popularized as a way to describe individuals who held significant authority, control, or influence in their respective fields, businesses, or communities.