From the founding of the United States, there has been skepticism about a centralized police force. This skepticism was influenced by the experience of being a colony under British rule, and, as a result, the framers of the Constitution ensured the legal rights of all citizens and policing takes place mostly on the state and local level. Even though Americans favored state and local law enforcement, the creation of a national government meant that a national law enforcement agency was needed. Early federal law enforcement agencies included the United States Marshal Service and the Postal Inspection Service. By the early 1900s, there were only a few federal law enforcement agencies in the United States. Since then, the number of federal law enforcement agencies has grown, and the jurisdiction of existing agencies has often expanded. Today, there are more than twenty different federal agencies, employing over 100,000 officers and agents.