Cruising grew in popularity after the First World War. More passengers than ever wanted to travel by sea for pleasure, rather than simply to get from one place to another. Liners were microcosms of society, where class boundaries were preserved. Cruising was an enjoyable experience for many. However, first-class passengers and officers travelled in greater style and luxury than third-class passengers and crews. Following the Second World War and hardships of the 1950s, the 1960s brought rising incomes, increased leisure time and other social changes. These enabled many more people to go on cruises.