Javier Sádaba (Vizcaya, 1940), is a graduate of Humanities from the Universidad Pontificia de Salamanca, and in Theology from the Gregorian University in Rome; He has a PhD in Humanities from the Universidad Complutense de Madrid. He has been a profesor at various universities throughout the world, such as Tübingen (Germany), Columbia (NY, USA) and Oxford and Cambridge (UK). He is currently Profesor of Religious Philosophy  and Ethics at the Universidad Autónoma de Madrid.
Outstanding amongst his works are: Saber vivir (1984), Diccionario de Ética (1997), La filosofía contada con sencillez (2002) and De Dios a la nada (2006). In his work he has has dealt with problems related to everyday life and happiness.