What adventures could recommend where research and social encounters are more relevant than combat?

@mikemearls What D&D adventures of any edition could recommend me where research and social encounters are more relevant than combat?

— Yosefat Nava (@YoseatNava) July 22, 2017

B6 The Veiled Society
C3 Lost Island of Castanamir
CM1 Test of the Warlords

That's off the top of my head. Dungeon had bunch. Suggestions? https://t.co/FwNsqZm7Gr

— Mike Mearls (@mikemearls) July 23, 2017