India has one of the largest, most highly diversified economies in the world, but, because of its enormous population, it is—in terms of income and gross national product (GNP) per capita—one of the poorest countries on Earth. Since independence, India has promoted a mixed economic system in which the government, constitutionally defined as “socialist,” plays a major role as central planner, regulator, investor, manager, and producer. Starting in 1951, the government based its economic planning on a series of five-year plans influenced by the Soviet model. Initially, the attempt was to boost the domestic savings rate, which more than doubled in the half century following the First Five-Year Plan (1951–55). With the Second Five-Year Plan (1956–61), the focus began to shift to import-substituting industrialization, with an emphasis on capital goods. A broad and diversified industrial base developed. However, with the collapse of the Soviet system in the early 1990s, India adopted a series of free-market reforms that fueled the growth of its middle class, and its highly educated and well-trained workforce made India one of the global centres of the high-technology boom that began in the late 20th century and produced significant annual growth rates. The agricultural sector remains the country’s main employer (about half of the workforce), though, with about one-fifth of the gross domestic product (GDP), it is no longer the largest contributor to GDP. Manufacturing remains another solid component of GDP. However, the major growth has been in trade, finance, and other services, which, collectively, are by far the largest component of GDP.