The National Democratic Revolution (NDR) is described as a process through which the National Democratic Society (NDS) is achieved; a society in which people are intellectually, socially, economically and politically empowered. The drivers of the NDR are also called the motive forces and are defined as the elements within society that gain from the success of the NDR. Using contour plots or concentric circles the centre represents the elements in society that gain the most out of the success of the NDR. Moving away from the centre results in the reduction of the gains that those elements derive. It is generally believed that the force that occupies the centre of those concentric circles in countries with low unemployment is the working class while in countries with higher levels of unemployment it is the unemployed. Some of the many theoreticians that have written about the NDR include Joe Slovo, Joel Netshitenzhe and Tshilidzi Marwala.