The terms Diversifying, Decentring and Decolonising characterise the ways that academic libraries are engaging with social justice issues, through multiple theoretical perspectives epitomised by the rejection of libraries as neutral spaces. The review covers numerous case studies of critically informed action, or praxis across a variety of functional areas and institutional settings. The review describes diversity work in libraries and the limitations of diversity on its own to address a LIS culture of Whiteness, the embedding of critical librarianship, and the rapid update of decolonisation discourse and practices. The review notes the LIS response to the combined threats of populism, or Trumpism, COVID-19 and police brutality and racism. The review concludes that the impact of those increased commitments to anti-racism is yet to play out, though some evaluation has started. The uptake of Critical Race Theory in LIS is a significant development that provides both theoretical frameworks and methodological approaches.