Attachment theory is a psychological theory that focuses on the importance of early relationships and bonds between infants and caregivers in shaping social and emotional development. Developed by psychologist John Bowlby and further expanded upon by Mary Ainsworth, attachment theory suggests that the quality of these early attachments can have a significant impact on an individual's beliefs about themselves and their relationships with others throughout their lives. The theory posits that infants develop attachment behaviors such as seeking proximity to their caregivers, wanting comfort and reassurance, and exploring the environment with a "secure base" provided by the caregiver. These experiences shape the infant's internal working models of themselves and others, influencing their ability to regulate emotions, form healthy relationships, and cope with stress and challenges. Attachment theory has been widely studied and applied in clinical psychology, child development, and relationship counseling. It has provided valuable insights into understanding how early experiences can impact mental health and well-being across the lifespan.