Covering attitudes to religion, politics, moral issues and pressing policy concerns, the data reveal intriguing contrasts and similarities between over 30 European countries. This rigorous comparative research is used to inform academic and political debate, allowing scholars, policy-makers, think tanks and other interested parties to measure and interpret changes over time in people’s values. It is the first social science project to win Europe’s prestigious Descartes Prize “for excellence in collaborative scientific research”, and is also one of the first to become a European Commission ‘Infrastructure’, a recognition of how much the ESS’s high technical and academic standards are advancing the field of comparative social measurement.New editions of data for ESS Rounds 1 to 4 are now available from the ESS Data Web Site.