A theoretical exploration of sociology would tell us that the term is commonly believed to be an attempt to understand the changes that took place in post-industrial European society. N. Chandrasiri Niriella, a well-known sociologist, takes an in-depth look into sociology, particularly urban sociology. The pioneers of urban sociology were a few until German sociologist Tonnies introduced two main theories. Radical theories in urban sociology came about in the 1960s with the oppression of black Americans. Marx and Webber were looked at for inspiration and the development of new models to suit the needs of the poor was structured. The book also looks into the evolution of civilizations and the significance of today's growing city population. Overall, this book, exploring the theories on city, is prepared with a view to provide a clear theoretical understanding of the nature and functions of city.