“Foundations of Logic and Metaphysics” is a work in which the rationalistic orientation of the author’s worldview was most manifested. Acting as an irreconcilable critic of empiricism, Chicherin believed that even in the field of material phenomena, which are the subject of experimental (external) knowledge, empiricism cannot do without metaphysical principles (without abstract concepts). How to think logically correctly and what is the process of thinking itself, what is reason what morality, law, love, freedom, being and non-being are, what Darwin is wrong about, how number relates to quantity, what truth is - the reader will find definitions and explanations of these and other philosophical concepts in this book.