Social interaction is a fundamental aspect of human biology and development.

Daniel Stern, a prominent developmental psychologist, argued that humans are born with an innate capacity for social interaction and that this capacity is just as fundamental as our biological needs for food and water. He proposed that the human brain has evolved to be highly attuned to social cues and that this sensitivity to interpersonal interactions is present from birth.

Stern’s work focused on the development of infants and young children, and he used observational and experimental methods to study the ways in which infants respond to and engage with their caregivers. He found that even in the first few months of life, infants are highly attuned to the emotional expressions and vocalizations of others, and that they actively seek out social interaction with their caregivers.

One of Stern’s key contributions was his theory of “vitality affects,” which refers to the way in which infants respond to and are affected by the emotional expressions of others. He proposed that when infants are engaged in social interaction, they experience a range of positive and negative affective states that are intimately tied to the emotional expressions of their caregivers. For example, when a caregiver responds to an infant’s needs in a warm and attentive way, the infant experiences a sense of pleasure and vitality. Conversely, when a caregiver responds in a disengaged or unresponsive way, the infant may experience a sense of discomfort or distress.

Stern argued that these affective states are not simply “reactions” to the caregiver’s behavior, but rather they are an integral part of the social interaction itself. He proposed that infants actively co-create the social world with their caregivers, and that the affective states that arise during social interaction serve as a kind of “glue” that binds the infant and caregiver together.

In Stern’s view, this prewired capacity for social interaction is a fundamental aspect of human biology and development. He argued that just as we need food and water to survive, we also need social interaction in order to thrive. This perspective emphasizes the importance of early social experiences in shaping our developmental trajectory and highlights the critical role that caregivers play in supporting healthy social and emotional development.