Why did sparta fall behind other greek city-states in many areas?

In 371 BCE it was badly beaten by Thebes. Over the wars of the previous century it had lost a high percentage of its citizens and, being a closed society, could not replace them. It also lost much of its territory and serf population which supported its economy. It sank into obscurity.

Signed into law in May 1862, the Homestead Act opened up settlement in the western United States, allowing any American, including freed slaves, to put in a claim for up to 160 free acres of federal land. By the end of the Civil War, 15,000 homestead claims had been established, and more followed in the postwar years.