Generally speaking, westward migration had a very negative impact on the Indian's way of life, since a large majority of Natives were either displaced from their homes or killed in order to make way for white settlements.
The Great Migration, or the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from 1916 to 1970, had a huge impact on urban life in the United States.
They both contributed to the invention of the skyscraper
