Wise deliberative spaces depend on multiple forms of trust. Chapter 6 explores the factors that have diminished social, epistemic, and institutional trust over recent decades. These factors include fewer face-to-face interactions, the weakening of cross-cutting identities (across party lines), rising income inequality, and the fragmentation of the news media. The chapter examines specific patterns of epistemic and institutional trust in scientists, academics, journalists, and government officials.Drawing on the work of Mercier and Sperber, it then analyzes the mechanisms people use to calibrate trust. Humans have evolved to rely on a combination of social cues, plausibility checks, and argument evaluation to decide whom to trust. While these strategies can be fairly reliable in small-scale environments, they tend to be less dependable in large-scale, complex societies. The chapter concludes by considering strategies to strengthen trust and improve trust calibration. These include cultivating democratic, deliberative systems at the local level, especially those that promote civic interaction with outgroup members, and enhancing the transparency and responsiveness of institutions.