Diachrony per­me­ates the prac­tices of con­tem­po­rary art. This avatar of the con­tact of cul­tures iden­ti­fies areas of knowl­edge and prac­tice from which a sense of ethics emerges, play­ing the role of a cat­a­lyst in the con­struc­tion of new iden­ti­ties. Cf. Tay­lor V. E. et al, Ed. (Rout­ledge 2001 : 114 – 15), on post­moder­ni­ty and the notion of ethic.