The book is a philosophical and autobiographical treatise that introduces a new form of scientific and philosophical method, which emphasizes on doubt and systematic questioning as the primary means to achieve knowledge. The author argues that by doubting everything, one can then rebuild knowledge, piece by piece, on a more solid foundation. This method is applied to a wide range of topics, including God's existence, the nature of the human mind and body, and the acquisition of knowledge.

This comprehensive work is a pioneering encyclopedia that aimed to present all the world's knowledge in a systematic and accessible way. It covers a wide range of topics including arts, sciences, crafts, professions, and technology. The book is also notable for its radical and enlightenment ideas, challenging traditional institutions and advocating for freedom of thought. It played a significant role in shaping the intellectual landscape of the 18th century and beyond.

"So Human an Animal" is a Pulitzer Prize-winning work that explores the complex relationship between the environment and human health. The book argues that the rapid technological advancements and urbanization of the 20th century have negatively impacted human health and happiness. The author suggests that a return to a more natural way of living and a reconnection with nature could help to alleviate these issues. The book is a call to action, urging society to consider the impact of its actions on the environment and human well-being.