Marx witnessed this first hand and wrote (1863): "they can do nothing better with the excrement produced by 4.5 million people than pollute the Thames at monstrous expense." This pollution event is often referred to as:

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Marx's observation was related to the event historically known as "The Great Stink" of 1858, during which the River Thames in London was heavily polluted with human waste, leading to a terrible stench throughout the city. This event prompted significant improvements in the London sewer system.

Marx Witnessed This First Hand and Wrote (1863): "They Can