Deindustrialisation refers to the process of social and economic change caused by the removal or reduction of industrial activity and employment in a country or region, especially heavy industry or manufacturing industry. Deindustrialisation is common to all mature Western economies, as international trade, social changes, and urbanisation have changed the financial demographics after World War II. Phenomena such as the mechanisation of labour render industrial societies obsolete, and lead to the de-establishment of industrial communities.