How did technological change in transport in the inter-war period reshape social structures and global trade?

Between 1919 and 1939 the motor vehicle stopped being a luxury and became a mass product. Ford's moving assembly line cut assembly time per vehicle from 12.5 hours to 93 minutes [1]. By 1926, London's Olympia Motor Show reported nearly 25,000 orders for "£100" cars [2]. This cheaper, faster transport changed how societies were organised and how goods moved around the world.

Assembly line → lower cost per unit → mass car market → social change + new trade flows

Reshaping social structures

• Wider access to mobility: A £100 price brought motoring within reach of the middle class, not only the wealthy [2]. Workers, however, were still largely excluded.
• A two-tier market: The same show displayed luxury cars priced above £3,000 [2]. Status came to depend on which car one owned, not whether one owned a car.
• A new factory working class: On the conveyor line each worker did one repeated task [1]. The monotony pushed labour turnover as high as 370% a year at Ford's Highland Park plant [3].
• Paternalism and surveillance: Ford's $5 daily wage came with a Sociological Department that looked into workers' home lives [3]. The employer's control now reached into the family.
• Changing settlement patterns: Buses, lorries and cars reduced dependence on railway lines. This made suburban living and closer rural–urban links possible.

Reshaping global trade

• Cars became traded consumer goods: Enquiries for British cars came "from all over the world" [2].
• Multinational production: American firms set up assembly plants abroad, and European makers adopted volume production. This was an early form of the global value chain.
• Imperial markets: Colonies such as British India absorbed manufactured imports, which deepened the colonial pattern of exporting raw materials and importing finished goods.
• Resource linkages: Mass motoring increased demand for oil and rubber, tying industrial economies to resource-producing regions.
• Fragility: The boom in costly goods like cars came just before the 1929 crash, after which trade contracted sharply.

Inter-war transport technology made mobility cheaper and widened trade. It also imposed strict factory discipline and made economies more exposed to boom and bust. For India's scale-led manufacturing push under Make in India, the lesson is to combine volume with worker welfare and fair competition. This fits SDG 8 (decent work) and SDG 9 (industry and innovation), so that mass production also benefits the people who do the producing.