John Stuart Mill was an English philosopher, political economist and civil servant. One of the most influential thinkers in the history of liberalism, he contributed widely to social theory, political theory and political economy. Also, you could Google his name and get the exact information.
Jonas Salk was the creator of the polio vaccine. President Eisenhower words express that he believed in Salk's work after a mistake in the production of the vaccine that contained live polio virus, a mistake that led to five deaths and fifty cases of permanent paralyses.
Because of this mistake public opinion lost faith in the vaccine and almost made the Congress to stop the financing of the national vaccine program. But because Eisenhower calm attitude and backing of the program and Salk's work, the program continued, eliminating polio across the nation.
