Hominins are exceptional constructors of their ecosystems. Over the course of humanevolution, their achievements increasingly impacted the environment on a global scale,transforming the conditions for development and evolution in unprecedented ways. Like someanimal species, hominins used tools to access resources—but they did so on a much broaderscale. They shifted their role in the carnivore guild from small game catchers and activescavengers to big game hunters, thus providing food for other consumers. They expanded thediversity of available food resources through the use of new technologies. They utilized rawmaterials that their ancestors had previously ignored. They enriched their resource space with awide array of artifacts, which became part of the learning environments for future generations.They diversified their social relationships and developed new forms of complex interaction.Cultural achievements enabled them to penetrate areas that were previously unappealing orinaccessible. The ecological consequences of this expansion were unpredictable.In doing so, hominins created new conditions for individual performance and development, forsocial learning, and for evolutionary processes—not only within their own species but also forsynanthropic niches of other species.With the ROCEEH Symposium “Diversifying Networks – How Culture Infuses the Environment”,we aim to explore and discuss the interplay between cultural achievements and environmentalaspects. How has the interconnection between hominins and their environment evolved? Whatimpact did hominins, through their cultural innovations, have on their surroundings and theirresource spaces? How did these resource spaces change—and how, in turn, did these changesaffect the evolutionary path of hominins and their cultural accomplishments?At this international conference, we aim to bring together researchers who examine, fromvarious perspectives, the material, social, and ecological aspects of hominin achievements,their macro- and micro-environments, and the mutual dependencies that have shaped humanevolution. By jointly assessing the current state of knowledge, we hope to gain a morecomprehensive and diachronic understanding of the diversifying ecological networks withinwhich human evolution has taken place.