The rational powers and abilities of each and every human being were attributed to his soul, which was a genius. Each individual place had a genius (genius loci) and so did powerful objects, such as volcanoes. The concept extended to some specifics: the genius of the theatre, of vineyards, and of festivals, which made performances successful, grapes grow, and celebrations succeed, respectively. It was extremely important in the Roman mind to propitiate the appropriate genii for the major undertakings and events of their lives.