Last and First Men is a science fiction novel written by Olaf Stapledon and published in 1930. The book explores the future history of humanity over a period of two billion years, charting the rise and fall of eighteen different civilizations.

The book is written in a highly imaginative and poetic style, which can make it challenging for some readers. However, it remains a significant work of science fiction, and it has influenced many other authors in the genre, including Arthur C. Clarke and H.G. Wells.

Olaf Stapledon (1886-1950) was a British philosopher and science fiction writer. Stapledon is best known for his science fiction works, which explore grand and philosophical themes, such as the nature of humanity and the universe, the limits of knowledge, and the evolution of civilizations.