The debate on postmodernity has two distinct elements that are often confused; (1) the nature of contemporary society and (2) the nature of the critique of contemporary society. The first of these elements is concerned with the nature of changes that took place during the late 20th century. There are three principal analyses. Theorists such as Callinicos (1991) and Calhoun (1995) offer a conservative position on the nature of contemporary society, downplaying the significance and extent of socio-economic changes and emphasizing a continuity with the past. Second a range of theorists have tried to analyze the present as a development of the "modern" project into a second, distinct phase that is nevertheless still "modernity": this has been termed the "second" or "risk" society by Ulrich Beck (1986), "late" or "high" modernity by Giddens (1990, 1991), "liquid" modernity by Zygmunt Bauman (2000), and the "network" society by Castells (1996, 1997). Third are those who argue that contemporary society has moved into a literally post-modern phase distinct from modernity. The most prominent proponents of this position are Lyotard and Baudrillard.