In this short and accessible book, Len McCluskey, General Secretary of Unite the Union, presents the case for joining a trade union. Drawing on anecdotes from his own long involvement in unions, he looks at the history of trade unions, what they do and how they give a voice to working people, as democratic organisations. He considers the changing world of work, the challenges and opportunities of automation and why being trade unionists can enable us to help shape the future. He sets out why being a trade unionist is as much a political role as it is an industrial one and why the historic links between the labour movement and the Labour Party matter. Ultimately, McCluskey explains how being a trade unionist means putting equality at work and in society front and centre, fighting for an end to discrimination, and to inequality in wages and power.