Africa Arab Spring GN301-674 Guinea H1-99 HM401-1281 Italy Karl Mannheim Neoliberalism Political Consumerism Political Participation Portugal Postmaterialism Tunisia Uganda Young people adulthood age-period-cohort analysis bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFF Social issues & processes::JFFP Social interaction civic participation cohort differences democracy democracy satisfaction digital divide epistemology focus groups generation generational differences generations