Trust in institutions is not lost in a single moment. It erodes through accumulated revelations — each scandal exposing not just individual misconduct but the systemic arrangements that enabled it, concealed it, and for years allowed it to continue unchallenged. This book examines the landmark scandals that fundamentally altered public confidence in political, financial, and social institutions across the twentieth and twenty-first centuries. From banking collapses engineered by regulatory capture to political corruption networks spanning multiple governments, from intelligence agency overreach to the organized protection of powerful abusers, each case is treated not as isolated wrongdoing but as a window into the institutional architecture that made betrayal possible. Drawing on parliamentary inquiry records, leaked documents, investigative journalism archives, and the testimony of whistleblowers, the book traces the patterns that recur across vastly different contexts: the concentration of power without accountability, the suppression of internal dissent, the capture of oversight bodies by the interests they were designed to regulate. It examines not only how scandals unfolded but why exposure so rarely produced lasting structural reform — and what that failure reveals about the relationship between elite networks and democratic governance. For readers seeking to understand how trust is built, weaponized, and ultimately broken at the highest levels of modern societies, this book offers a rigorous, evidence-grounded account of power operating beyond its legitimate boundaries.