6. How the Other Half Lives, Jacob Riis (1890) The Jungle, Upton Sinclair (1906)
The Grapes of Wrath, John Steinbeck (1939)
Unsafe at Any Speed, Ralph Nader (1965)
What has been the impact of these authors and their books on American society?
(1) Most Americans have developed a preference for escapist and romantic literature.
(2) Most American authors have adopted a conservative viewpoint
(3) American business has corrected poor conditions quickly.
(4) These works have had significant influence on social, political, and economic reforms.

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.