Strong and optimistic claims are frequently made about the extent and benefits of voluntary action and about the scope to increase it. This book draws together extensive research findings which challenge such claims. First, it shows that despite claims that volunteering constitutes an ‘essential renewable resource’ for social development, there are trends which are cause for concern. Second, the book shows how voluntary action – who does what, where, and how much they do – is highly stratified, as is evident with respect to evidence on the proportion of people engaged in it, variations in the contributions made by individuals, community-level variations in involvement and the extent to which involvement by individuals is sustained over time. Claims made about the benefits of volunteering are extensive and expansive, asserting assured benefits for health and well-being, civic engagement, employability and social capital. A review of the evidence from British studies of these issues shows that these claims are not firmly grounded. Volunteering has become an object of public policy, but whether governments can take the credit for volunteering levels is highly debatable. Engagement depends on individuals’ resources and attitudes, on opportunities to volunteer and on individuals’ changing life circumstances; how much governments can do to influence all of these is questionable. The prominence accorded to volunteering during the COVID-19 pandemic was not sustained, and the book concludes by reflecting on what sort of public policy framework might best provide individuals with the resources and opportunities to engage in volunteering.