Bowlby's theory of attachment proposes that: 1) Infants form attachments to caregivers innately because it was adaptive for survival, ensuring infants received food and protection. 2) Infants have social releasers like crying and smiling that increase the chances of receiving care, while parents have an innate drive to provide care during the infant's critical period. 3) The first attachment relationship provides an internal working model that influences future attachments through the continuity hypothesis.