major sources of fashion influence. Paradoxically, followers of rock music have often mistrusted the world of fashion, which has been seen as elevating image above substance. Rock fashions have been seen as combining elements of different cultures and periods, as well as expressing divergent views on sexuality and gender, and rock music in general has been noted and criticised for facilitating greater sexual freedom. Rock has also been associated with various forms of drug use, including the amphetamines taken by mods in the early to mid-1960s, through the LSD, mescaline, hashish and other hallucinogenic drugs linked with psychedelic rock in the mid-late 1960s and early 1970s; and sometimes to cannabis, cocaine and heroin, all of which have been eulogised in song. Rock has been credited with changing attitudes to race by opening up African-American culture to white audiences; but at the same time, rock has been accused of appropriating and exploiting that culture. While rock music has absorbed many influences and introduced Western audiences to different musical traditions, the global spread of rock music has been interpreted as a form of cultural imperialism. Rock music inherited the folk tradition of protest song, making political statements on subjects such as war, religion, poverty, civil rights, justice and the environment. Political activism reached a mainstream peak with the "Do They Know It's Christmas?" single (1984) and Live Aid concert for Ethiopia in 1985, which, while successfully raising awareness of world poverty and funds for aid, have also been criticised (along with similar events), for providing a stage for self-aggrandisement and increased profits for the rock stars involved. Since its early development, rock music has been associated with rebellion against social and political norms, most obviously in early rock and roll's rejection of an adult-dominated culture, the counterculture's rejection of consumerism and conformity and punk's rejection of all forms of social convention, however, it can also be seen as providing a means of commercial exploitation of such ideas and of diverting youth away from political action. Role of women Professional women instrumentalists are uncommon in rock genres such as heavy metal although bands such as Within Temptation have featured women as lead singers with men playing instruments. According to Schaap and Berkers, "playing in a band is largely a male homosocial activity, that is, learning to play in a band is largely a peer-based ... experience, shaped by existing sex-segregated friendship networks. They