The Pendleton Civil Service Reform Act is a United States federal law passed by the 47th United States Congress and signed into law by President Chester A. Arthur on January 16, 1883. The act mandates that most positions within the federal government should be awarded on the basis of merit instead of political patronage.
By the late 1820s, American politics operated on the spoils system, a political patronage practice in which officeholders awarded their allies with government jobs in return for financial and political support. Proponents of the spoils system were successful at blocking meaningful civil service reform until the assassination of President James A. Garfield in 1881.