Project Tiger was launched in 1973 by former Prime Minister Indira Gandhi to protect India's declining tiger population, which had dropped to around 1,800 from an estimated 40,000 at the start of the 20th century. The program established nine tiger reserves in various Indian states to help maintain viable tiger populations in the country. Its goal was to conserve tigers by eliminating human exploitation of the species and its habitat, and maintaining a balance in the ecosystem. Factors such as poaching, shrinking habitat due to growing human population, and depletion of prey species had contributed to the tiger population decline.