“The first typical adolescent of modern times was Wagner's Siegfried. : the music of Siegfried expressed for the first time that combination of (provisional) purity, physical strength, naturism, spontaneity and joie de vivre which was to make the adolescent the hero of our twentieth century, the century of adolescence.” FirstsMusicModernCenturyStrengthHeroFirst TimeCombinationPurityAdolescenceTypicalTwentieth CenturySpontaneityModern TimesWagnerPhysical StrengthJoie De Vivre Book:Centuries of childhood: a social history of family life Source: Centuries of childhood: a social history of family life