The political disengagement of young people is a common theme across many of the mature democracies. One element of this disengagement is a cluster of characteristics and proclivities that might be termed "political inattentiveness." This inattentiveness among the young comprises three key elements: low levels of political knowledge, a relative lack of political interest and inattention to politics in the media. This paper seeks to advance our understanding of political inattentiveness among the young by assembling longitudinal data for six countries: Canada, the United States, Britain, Sweden, the Netherlands and Norway. The surveys are used to trace differences between young and old in political knowledge, interest and media attentiveness from the 1950s to the present day. This longitudinal and comparative analysis helps establish which dimensions of political attentiveness have changed most notably, the timing of these changes and the degree of cross-national divergence and convergence. In addition to the empirical contribution, the paper also assesses the implications of the findings for different theoretical accounts of political disengagement among the young. ..PAT.-Unpublished Manuscript [ABSTRACT FROM AUTHOR]