Joined-up government is a complex, expensive and elusive goal, which has captured the imaginations of public administrators since the 1950s. It offers great promise for tackling the complex or ‘wicked’ policy problems that concern the governments of industrialised countries. Despite ongoing interest, there remains and absence of core methods and principles to make joined-up governance work in practice. Grassroots to Government comprehensively explains the state of evidence in joined-up government, illustrated by an in-depth case study of the implementation experiences of a national initiative, the Australian Social Inclusion Agenda.