Our society faces a number of major social challenges in the coming decades. To expand and enrich our understanding of these challenges and the processes that underlie them, the social sciences need to go beyond the current data sources and methods and unlock emerging opportunities in new data spaces. Social science research needs to exploit the potential of new forms of data from administrative processes, data analytics and machine learning, digital communications and mobility, and other sources. It also needs new forms of data acquisition (such as virtual interviews, bots and augmented reality) alongside the ongoing development and expansion of well-established longitudinal survey programmes. These new data forms and data linkages must be initiated, developed and subjected to rigorous quality testing.