As countries went into lockdown in 2020, people turned to music for comfort and solidarity. Neighbours sang to each other from their balconies; people participated in online music sessions that created an experience of socially distanced togetherness. Nicholas Cook argues that the value of music goes far beyond simple enjoyment. Music can enhance well-being, interpersonal relationships, cultural tolerance, and civil cohesion. At the same time, music can be a tool of persuasion or ideology. Thinking about music helps bring into focus the values that are mobilised in today’s culture wars. Making music together builds relationships of interdependence and trust: rather than escapism, it offers a blueprint for a community of mutual obligation and interdependence. Music: Why It Matters is for anyone who loves playing, listening to, or thinking about music, as well as those pursuing it as a career.