Quote by Upton Sinclair
"I have devoted thirty years to the study of the social evil, and I know it by heart."
"I have devoted thirty years to the study of the social evil, and I know it by heart."
"It is difficult to get a man to understand something, when his salary depends on his not understanding it."
"The American system of ours gives each and every one of us a great opportunity."
"There is one thing that the American people always rise up and do--when they get ready."
"I am nothing in this world but a writing machine."