 Cities became massive building sites, resulting in the reconstruction of some war-torn buildings but also the construction of drab dilapidated system-built apartment blocks.Urban living standards plummeted because resources were tied up in huge long-term building projects, while industrialization forced millions of former peasants to live in hut camps or grim apartment blocks close to massive polluting industrial complexes.Collectivization is a process pioneered by Joseph Stalin in the late 1920s by which Marxist–Leninist regimes in the Eastern Bloc and elsewhere attempted to establish an ordered socialist system in rural agriculture.