Julio Senador Gómez (1872-1962) was an important member of the Spanish Georgist movement between 1917 and the Civil War and also probably its most influential public spokesman, after becoming a well-known publicist in Spain during the first third of the twentieth century. However, Senador’s...

This paper discusses briefly how economic thinking on the conservation problem has developed during the twentieth century, culminating finally in the sustainability debate. Specifically, its aim is to emphasize the relevance of Lewis Gray’s contribution. In “The economic possibilities of...