This document discusses the societal impact of digital technologies and policies. It outlines two lessons learned from sustainable development: integration and diversity, as well as the link between science and policy. The digital transition brings changes to human/technology/nature relationships and challenges of scarcity/abundance and reality/virtuality. Public sectors are expected to balance classic and radical approaches, and foster interoperability between organizations, individuals, policies and scientific disciplines. Collective learning and digital social sciences are needed to understand and sustain smart synthesis regarding these issues.