Quote by Upton Sinclair
"What we fail to acknowledge in our society becomes the invisible foundation it rests upon."
More from Upton Sinclair
"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."