Across the world since the first commission in Uganda in 1974, there have been more than 40 Commissions dedicated to combinations of promoting truth, justice, and reconciliation, including between settlers and Indigenous peoples in settler-colonial societies like Australia. This chapter discusses some of the most significant lessons to be learnt from commissions around the world, focusing in particular on the settler societies of Canada, Aotearoa (New Zealand) and South Africa. Topics include the significance of the United Nations Declaration on the Rights of Indigenous Peoples (UNDRIP), non-government commissions, structural discrimination and socio-economic justice, reporting of sexual abuse, and the vital roles of publicity and political will in ensuring that commissions’ recommendations are implemented. In an age of post-truth where beliefs can outrank facts, the approach is one of realistic criticism based on the understanding that commissions have very different goals ranging from peacebuilding to economic reform, and from empowerment of the marginalized to multiple forms of reconciliation. Consideration is also given to cultural and economic contextualisation.