Before you is a book on philosophy written by the famous French philosopher and mathematician Roger Caratini, one of the co-authors of the most authoritative illustrated French encyclopedia Borda, an analogue of the famous Britannica. It sets out the history of philosophy, analyzes the main philosophical categories and systems. This book is intended not for narrow specialists in the field of philosophy, but for everyone who wants to systematize their views on the surrounding reality and is experiencing a shortage of classical humanitarian education. The purpose of this book is to return people to philosophical thinking, to give them the opportunity to immerse themselves in true philosophy, at least for a while to isolate themselves from momentary politics and utilitarian problems.