Centred on the dynamic and performative field of interactions and relations in the world, his critical and speculative approach to the cognitive life sciences offers a vision of animals as acting subjects and bearers of culture, whose action and agency is also indispensable to human culture. In tracing the ways in which we share our lives and histories with animals in different contexts of interaction, Marchesini's cutting-edge philosophical ethology also contributes to an overarching philosophical anthropology of the human as the animal that most requires the present and input of other animals. This book was originally published as a special issue of Angelaki: Journal of the Theoretical Humanities.