Public Opinion. Simplified.

Heat map showing total years of data for each country


A recent report from the Centre for the Future of Democracy uses HUMAN Surveys data – 4.8 million respondents in 160 countries between 1973 and 2020.  Findings show youth satisfaction with democracy is lower than other age groups and lower than previous generations at the same stage of life. The report has been featured by The Financial Times, The Guardian, Forbes, The Times, and many others.

Cover of the Youth Satisfaction with Democracy 2020 report


With survey data from 182 countries, our merged database provides unprecedented opportunists for comparative and time-series research. However, while developed countries like Germany and the United Kingdom have hundreds of thousand respondents, less developed countries like Bhutan and Turkmenistan only have hundreds of respondents.


The current version of our merged database includes 18 million respondents in over 15000 surveys from 60 sources since the 1940s. A previous version of the merged data is available through Harvard Dataverse as an example. However, we will not be releasing future merged datasets like this as we do not own the data. The database nevertheless continues to expand as we add more sources and variables for ongoing research projects.

Total cumulative number of respondents included in the merged database


We work with many types of surveys including cross-national sources such as the World Values Survey, national series such as the American National Election Studies, and even one-off studies such as the Kenya Democratization Survey Project. By combining survey data from many sources, we gain longer term and broader coverage of more countries.


HUMAN Surveys formats, merges, and harmonizes freely available and nationally representative public opinion surveys from around the world. We do this to answer important questions about global societies and gain a better understanding of political, economic, and social issues affecting billions of people. The goal is to provide evidence-based solutions to inform policies, strategies, initiatives, and reforms

Dr Andrew Klassen, Prinicipal Researcher, HUMAN Surveys


We enjoy helping others with their research and working in small teams to address complex research problems. Ongoing collaborations include projects at the University of Cambridge, University of Oxford, Monash University, and University of Southampton. Please contact us if you would like to work together.