the science of language evolution for the Polish reader who has not had access to the English literature on the subject: excellent introductions by Sverker Johansson (2005) and Tecumseh Fitch (2010) and other forms of secondary and tertiary literature on language evolution, such as a handbook of language evolution by Maggie Tallerman and Kathleen Gibson (2011) or James Hurford's broad-scope monographs -The Origins of Meaning (2007) and The Origins of Grammar (2011). Hence, our presentation is for the most part confined to sketching an outline of the problems of contemporary language evolution, and not an in-depth, extensive discussion of these problems.Working on the English version, we have decided to reduce the number of supplementary texts, particularly in Chapters 2 and 3. We have also radically shortened the Chapter 1 on the historical context out of which the modern-day science of language evolution emerged. This area is certainly underexplored, but after the publication of Przemysław Żywiczyński's book Language Origins: From Mythology to Science (2018), we felt there is no reason to repeat what can be found there, in a more extensive form.Charles Darwin, The Descent of Man (1871) For Darwin (1871), language was the greatest invention of humankind alongside fire. Maynard Smith and Szathmáry (1995) consider the emergence of language to be the last of the greatest evolutionary breakthroughs, and its explanation was called to be the most difficult problem in science (Christiansen and Kirby, 2003b). 1 Language is a unique communication system in which symbolic units can be combined into larger wholes with the use of syntactic rules, and since it is human-specific, language also defines our uniqueness.This book is the first monograph written originally in Polish on the evolution of language -a new field of science, which emerged at the end of the 20 th century. As a field, it is developing dynamically, which should not be surprising, given that rapid development is an inherent aspect of youth. The evolution of language, by being a thoroughly interdisciplinary enterprise, derives its impetus from other sciences, such as modern evolutionary theory, genetics, linguistics, neuroscience, palaeoanthropology, comparative psychology, and primatology, to name only a few. Yet, the evolution of language, as a scientific project, is successful because of the questions which determine the direction of its investigations: "Where does language come from, and why do, out of all living forms, only humans have it?" Language is the feature that unambiguously shows the difference between humans and other animals. Contemporary science provides a wealth of evidence that other traits, which traditionally were considered to be humanspecific, are actually possessed by other species, mainly other apes. We can cite self-awareness, for example. Comparative psychologists have assumed the so-called "mirror test" (developed by Gordon Gallup, 1970) as a rough indicator, which showed self-awareness not only in all great apesthe chimpanzee,...