" A laborer no longer makes whole articles. He receives raw materials, puts his touch on them, and passes them to another worker in the series. When the articles are quite finished they are carried out of sight by currents of commercial exchange. These currents are untraceable. "
- John Bates Clark

In today's complex industrial world, workers are no longer involved in creating entire products from start to finish. Instead, they take raw materials, apply their specific skills or expertise to them, and pass on the partially completed items to other workers in a series of assembly lines or production processes. Once the final product is complete, it moves beyond our view through commercial channels that are often difficult to track.

This quote by John Bates Clark highlights a significant shift in how goods are produced and distributed, emphasizing the division of labor and the specialization of tasks within manufacturing environments. Each worker contributes a part of their skill or effort to create something larger than themselves but loses sight of the final product once it leaves their hands. This process reflects broader economic trends where individual contributions become intertwined with global supply chains, making it challenging for any single person to trace how their work fits into the bigger picture. The quote also underscores the interconnectedness and complexity of modern economies, illustrating that while each worker plays an essential role in production, understanding the full journey of a product can be elusive.

John Bates Clark was a prominent American economist who lived from 1847 to 1938. He is known for his work on marginal productivity theory and made significant contributions to classical economics by integrating concepts such as wages and profit into broader economic theories. His insights have helped shape our understanding of labor markets, income distribution, and the principles that govern how economies allocate resources among workers and businesses.