This collection consists of 9 articles by the most authoritative historian of science Alexander Koyre, the first of which was published in 1922, and the last, written shortly before the death of the author, appeared posthumously in print - in 1965, Alexander Koire was always interested in the history of ideas as such, he was convinced and proved to everyone with his work that scientific and philosophical thought was and is in constant fruitful interaction. The consequence was a grandiose program conceived by the author: to trace all the main directions of scientific and philosophical thought up to the present - from the Newtonian system to field theory.