Sheikhdom of Kuwait In the early 20th century, Kuwait immensely declined in regional economic importance, mainly due to many trade blockades and the world economic depression. Before Mary Bruins Allison visited Kuwait in 1934, Kuwait lost its prominence in long distance trade. During World War I, the British Empire imposed a trade blockade against Kuwait because Kuwait's ruler (Salim Al-Mubarak Al-Sabah) supported the Ottoman Empire, who was in the Central Powers. The British economic blockade heavily damaged Kuwait's economy. The Great Depression negatively impacted Kuwait's economy starting in the late 1920s. International trading was one of Kuwait's main sources of income before oil.
Historiography of the fall of the Ottoman Empire the first writers in the 1960s to summarise the works on Ottoman socio-economic history. He suggested one of the reasons for Ottoman economic decline was the inability of the ruling class to make a clear choice between war and the more conventional types of capital formation. Berkes' work however focused on the confrontation of the Ottomans and the Europeans, and though important, had little detail on the commercial activities of the state. The Ottomans saw military expansion and fiscalism as the primary source of wealth, with agriculture seen as more important than manufacture and commerce. Berkes described the Ottoman economy