John believed that mental health and behavioural problems could be attributed by the early childhood life. He also believed that attachment behaviours are instinctive. They will be activated if and when something threatens their safety, E.g. separation, fear. John believed a child only makes one attachment in the first 2 years of their life e.g. their mother and thinks every relationship following this will be based on this one. Therefor a positive relationship with their first person would lead to positive future relationships, trusting of other people and socially comfortable where as a negative relationship could lead to lack of a social life, depression, hard to show affection and very untrusting of other