In recent years, there have been many efforts to redress past grievances, at least symbolically, and in some instances, substantively. Among the more prominent examples are efforts by Holocaust survivors and victims' heirs to recover looted gold and art, calls on the part of the Organization of African Unity for Western governments to pay reparations for slavery, and some modest material and symbolic compensation for the wrongs committed against a number of indigenous peoples. These initiatives, along with others, represent essentially voluntary moves that seek to soften the harsher aspects of past injustice.