In connection with industrialization, overpopulation in the major cities became a problem to the extent that medieval cities suffered overload.

The problem of overpopulation in European cities was exacerbated due to lack of running water, the poor sewage systems and the lack of public transport. Living conditions in the overcrowded post-industrial London was miserable.

With so many people in the same place, the diseases were rapidly spreading. In the medieval cities, the sewers ran along the streets instead of the today known underground sewerage systems.

1The town's residents usually threw their waste out of the windows and into the streets as they had always done. Wastewater was everywhere and created a permanent stink.

Joseph William Bazalgette was the man behind the revolutionizing invention of the more modern sewerage systems, which started in 1859 after “The Great Stink” and the cholera epidemic. But to what extent did the new sewerage system solve the problems of society?

At first, technological advancement and a better view of a more modern and automated world rooted in some of the many problems that occurred at the cities' overpopulation - including the development of sewer systems. Bazalgette would use the force of gravity to create a sewer system.

The invention of the sewer created a cleaner and healthier London and its inhabitants. The new sewage systems remedied the problem of water-borne diseases today.

This is for example cholera, which was a disease that most of the population got. The disease occurred because the water is not clean enough, and as mentioned earlier, the sewage is located on the streets around the entire city.