This document provides an overview of Elisabeth Noelle-Neumann's Spiral of Silence theory. The theory posits that people are less likely to express minority views due to fear of isolation. It suggests the media plays a role in shaping public opinion and silencing minority views. However, committed activists or "hard cores" can shift public opinion over time by sustained advocacy. The document outlines the key concepts of the theory including the role of the media and assessments of public opinion.