The International Social Survey Program (ISSP) is a long-term international research project that has existed since 1983. This research project is based on international and cross-project collaboration in social science research. It focuses on important attitude issues. ISSP combines two levels of comparison - a comparison in an international and a time perspective. Research activities are carried out continuously in annual cycles. The Czech survey within Social Inequality module has been conducted four times since the existence of the ISSP: 1992, 1999, 2009 and 2019. ISSP Social Inequality modules focus on social groups, poverty, cultural capital, values and other.