Why do certain relationships just not work? Why is it hard to know what some people want and why other people are just too needy? Or why do relationships fizzle out when all you want is closeness? And why do the words 'love' or 'commitment' scare some people off but not others? Well, the answers could be in your attachment style. Here, the wonderful School of Life explain clearly and succinctly what attachment theory is, from John Bowlby who pioneered the theory in the 1950s to reflecting on your own attachment style be it secure, anxious or avoidant and what happens when we pair up with someone else.