The article discusses the concept of brain-to-brain coupling, which refers to the synchronization of neural processes between individuals through environmental signals. This mechanism allows for the coordination of actions and the creation of shared social experiences. The study emphasizes the importance of considering multiple brains rather than focusing solely on individual cognition. It highlights how verbal and non-verbal communication, such as gestures and facial expressions, facilitate brain-to-brain coupling, enabling complex joint behaviors. The paper also explores how social interactions influence language development, as seen in both human infants and songbirds. It further discusses the role of coupled oscillations in speech perception and production, showing how speech signals can resonate with brain rhythms. The article concludes that brain-to-brain coupling is essential for understanding social behavior and communication, as it allows for the sharing of information and the coordination of actions across individuals. The study provides evidence that social interactions are crucial for the development of communication systems and that brain-to-brain coupling plays a fundamental role in shaping social cognition.The article discusses the concept of brain-to-brain coupling, which refers to the synchronization of neural processes between individuals through environmental signals. This mechanism allows for the coordination of actions and the creation of shared social experiences. The study emphasizes the importance of considering multiple brains rather than focusing solely on individual cognition. It highlights how verbal and non-verbal communication, such as gestures and facial expressions, facilitate brain-to-brain coupling, enabling complex joint behaviors. The paper also explores how social interactions influence language development, as seen in both human infants and songbirds. It further discusses the role of coupled oscillations in speech perception and production, showing how speech signals can resonate with brain rhythms. The article concludes that brain-to-brain coupling is essential for understanding social behavior and communication, as it allows for the sharing of information and the coordination of actions across individuals. The study provides evidence that social interactions are crucial for the development of communication systems and that brain-to-brain coupling plays a fundamental role in shaping social cognition.