John Bowlby was psychoanalyst. This means he looked into how social factor and individual behaviours interact with one another.
He believes that a child is influenced the most by relationships. This could be made with the primary carer of the child.
Bowlby believed that babies needed to attach to one main person. This is called monotropic attachment. This attachment needed to be formed in the first few months of the babies life.
For the first two years Bowlby believed that the child will need continual care from the main carer, this is because it is critical for the attachment to form.
However Bowlby later revised his ideas and stated that children were capable of forming