After 1800 the economy took off, and industrialized rapidly, with textile, coal, iron, railroads, and most famously shipbuilding and banking. Glasgow was the centre of the Scottish economy. After the end of the First World War in 1918, Scotland went into a steady economic decline, shedding thousands of high-paying engineering jobs, and having very high rates of unemployment especially in the 1930s. Wartime demand in the Second World War temporarily reversed the decline, but conditions were difficult in the 1950s and 1960s. The discovery of North Sea oil in the 1970s brought new wealth, and a new cycle of boom and bust, even as the old industrial base had decayed.