What makes a human being feel lost when he is away from his caregivers as a child? There are many different theories on this topic, but one well-known theory is Attachment Theory written by John Bowlby in the mid-20th century. John Bowlby, born February 26, 1907, was a 20th century psychologist who contributed to too many modern psychoanalytic theories. At a young age she barely saw her mother because she believed, like many other mothers of the time, that affection and attention would lead to spoiling the child. So he developed a deep attachment to his nanny since he never saw his mother. He suffered a loss when she left when he was four. Born in London, he grew up in an upper-middle-class family who sent him to boarding school at the age of seven, common for wealthier families in Britain at that time to send children around that age. He found boarding school terrible writing, "I wouldn't send a dog to boarding school at the age of seven" (Bowlby, 1999), but says he finds boarding schools suitable for children saying in volume two of his tr...