Quote by Upton Sinclair
"The great revolution in human relations will come about when we learn to include the animal in our moral concern."
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."