Why did the 1890 census say that the united states no longer had a frontier?

 The correct answer is :  Through the census conducted in 1890 it was announced that the border region of the United States no longer existed and that the census office would no longer seek migration of the population to the western United States, until this year The United States had a settlement border.

- "made the south's economy grow rapidly and a small effect that a lot of people don't know is that it made the more demand of slaves and cotton products. and also new states formed due to plantations growing in size."

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martin luther king (1929-1968) was an activist for the african american rights, mr. king has a profile of a kind leader that built a tenacity, respect and full of hope future. he was an activist through civil disobedience and no violence pressure mechanisms. he tried to build a more egalitarian and fair society. his efforts carried a reivindication message of the civilian rights to every west corners. for that reason, he won the nobel prize in 1964.