The 19th century saw significant social change, and the development of a distinct "Filipino" identity among the mestizo elite. Members of the educated Ilustrado class, influenced by liberal ideas, launched the Propaganda Movement. Rejection by Spanish authorities led to a national awakening, the emergence of an independence movement, and a revolution which became entwined with the Spanish–American War. While the revolutionaries declared independence, Spain ceded the Philippines to the United States in 1898. Through the subsequent Philippine–American War and later actions, the United States established effective administration over the entire archipelago, and introduced political structures that reflected those of the United States.