Constructive anarchy sustains various means by which people can take greater control over the decisions that fundamentally affect their lives, including around issues of work, shelter, education or technology. Anarchists argues that shifts in structures of employment, such as flexibilization, lean production and the institutionalization of precarity in labor, have stolen time away from people that might otherwise provide opportunities for community activities and resource building. Anarchist organizing is built on what Colin Ward calls social and collective ventures rapidly growing into deeply rooted organizations for welfare and conviviality. At the heart of anarchist infrastructures of resistance, in all of their various forms, are practices of mutual aid. Anarchists try to extend mutual aid relations until they make up the bulk of social life. In his terms these manifestations of constructive anarchy are "quiet revolutions". Still, constructive anarchy does not rely on ready-made plans or the supposedly scientific calculation of some variants of Marxism-Leninism.