Adolf Freiherr Knigge was a German writer and philosopher. He is best known for his book titled "On human society" (1788), which is often called "the first modern etiquette guide." The book covers topics such as manners, etiquette, and appropriate behavior in various social situations. It was met with great popularity and had a significant influence on the development of modern etiquette.
Aside from this book, Knigge also wrote various other works of philosophy, literature, and social commentary, exploring themes of human relationships, morality, and social reform. His writings had a notable impact on German society and the wider Enlightenment movement of the late 18th century.