The term ‘protest song’, which became so familiar in the context of the anti-war movement in the United States during the 1960s, has been widely applied to the songs of socio-political commitment which have developed out of traditional folksong in most of the countries of Latin America over the past twenty years (see Pring-Mill 1983 and forthcoming). Yet it is misleading insofar as it might seem to imply that all such songs are ‘anti’ something: denouncing some negative abuse rather than promoting something positive to put in its place. A more helpful designation is that of ‘songs of hope and struggle’, enshrined in the titles of two Spanish American anthologies (C. W. 1967 and Gac Artigas 1973), which nicely stresses both their ‘combative’ and their ‘constructive’ aspects, while one of the best of their singers – the Uruguayan Daniel Viglietti – describes his own songs as being ‘in some measure both de protesta and de propuesta’ (i.e. as much ‘proposing’ as they are ‘protesting’). The document with which this article is chiefly concerned uses the term ‘revolutionary song’, which clearly covers both those aspects, but such songs may be seen to perform a far more complex range of tasks than any of those labels might suggest, as soon as their functions are examined ‘on the ground’ within the immediate context of the predominantly oral cultures of Latin America to which they are addressed: cultures in which traditional folksong has retained its power and currency largely undiminished by the changes of the twentieth century, and in which the oral nature of song (with the message of its lyrics reinforced by music) helps it to gain a wider popular diffusion than the more ‘literary’ but unsung texts which make up the greater part of the genre of so-called ‘committed poetry’ (‘poesía de compromiso’) to which the lyrics of such songs clearly belong (see Pring-Mill 1978, 1979).