Jesper Juul (18 April 1948 – 25 July 2019) was a Danish family therapist and author. He wrote many books on parenting to a general audience. In his book "Your Competent Child" (1995, in English 2001) he argues that families today have destructive values. The book "Has so far" (2007) been translated into 13 languages. He was born in Vordingborg, Denmark.