The document summarizes the history of the Second Spanish Republic from 1931 to 1936. It establishes that the Republic lasted from 1931 to 1939, with five years of peace and three years of war, as the military uprising in 1936 led to the Spanish Civil War. The Republic implemented reforms that improved workers' rights but also faced instability, as these reforms confronted landowners and businessmen. The economic crisis and restrictions on public spending also hindered consolidating democracy. The main cause of the Republic's end was the military uprising in 1936, which undermined the government's ability to maintain order and divided the country.