'Transparency is an important foundation for trust. In this issue we tackle some of the biggest political and social issues, many underpinned by the need for transparency from the justice system, to political scrutiny, to science itself. Leading the edition, we look at the intentionally opaque and dangerously irresponsible self-regulation regime of the Big Tech companies. How can an industry with a direct line to all of our brains, a rampaging profit motive, and the ability to dramatically tilt public discussion, largely be unregulated by government?' (Publication abstract)