The European Social Survey (ESS) is an academically driven cross-national survey that has been conducted across Europe since 2001. The ESS was awarded European Research Infrastructure Consortium (ERIC) status by the European Commission in November 2013 and was recognised as an ESFRI Landmark in the ESFRI (European Strategy Forum for Research Infrastructures) Roadmap in March 2016. The survey measures the attitudes, beliefs and behaviour patterns of diverse populations in more than thirty countries. The main aims of the ESS are: - to chart stability and change in social structure, conditions and attitudes in Europe and to interpret how Europe’s social, political and moral fabric is changing; - to achieve and spread higher standards of rigour in cross-national research in the social sciences, including for example, questionnaire design and pre-testing, sampling, data collection, reduction of bias and the reliability of questions; - to introduce soundly-based indicators of national progress, based on citizens’ perceptions and judgements of key aspects of their societies; - to undertake and facilitate the training of European social researchers in comparative quantitative measurement and analysis; - to improve the visibility and outreach of data on social change among academics, policy makers and the wider public. The ESS data is available free of charge for non-commercial use and can be downloaded from the ESS website.