Roosevelt's New Deal programs worked to aid the rural poor, as well as restore soil quality and establish better farming practices.
The Resettlement Administration and Farm Security Administration were agencies created to help poor people in rural areas.
The Civilian Conservation Corps (CCC), the Soil Erosion Service (later known as the Soil Conservation Service), and the Works Progress Administration (WPA) were involved in improving land conditions. Working in conjunction with the National Forestry Service, the CCC and WPA participated in planting millions of trees to act as windbreaks, to prevent the kind of blowing erosion of soil that occurred in the Dust Bowl.
Disagreements between the two formed early divisions within the government regarding policies on economics. They became the foundation for political parties as Hamilton wanted to have high trade tariffs and a centralized bank (Bank of the United States) and Jefferson wanted to concentrate on what would be good for the common man (the policies of the Democrat-Republicans).
Besides the progress of vital medical subjects such as burns treatment, also aim at the development of individual cultures, friendly relations and cooperation for the solution of common problems, as well as reviving and promoting the spirit of Mediterranean civilization, for the benefit of all mankind
More Americans were now able to move to the suburbs.
Population growth after World War II was a cause of expansion of cities into suburbs. The prices of homes in suburbs were more affordable to middle class families, due to lower land prices and new building practices like tract housing. With the growth of the suburbs, improvement of roadways became a priority. The Federal-Aid Highway Act passed in 1956 advanced and enabled further growth of the suburbs surrounding city centers.
As far as I remember, the answer is: One historical contribution of the Neolithic period is the overall ability to grow crops. Neolithic period is the period when people earned advanced skills in growing corps.