Salvador de Madariaga y Rojo ( July 23 , 1886 A CoruÃ a , Spain - December 14 , 1978 Locarno , Switzerland ) was a Spanish diplomat , writer , historian and pacifist . Salvador de Madariaga y Rojo ( 23 July 1886 , La CoruÃ a , Spain - 14 December 1978 , Locarno , Switzerland ) was a Spanish diplomat , writer , historian and pacifist .