The greatest productive force is human selfishness. – Robert A. Heinlein
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Other Quotes from
Selfishness
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If we were not all so excessively interested in ourselves, life would be so uninteresting that none of us would be able to endure it. – Arthur Schopenhauer
The very word secrecy is repugnant in a free and open society and we are as a people inherently and historically opposed to secret societies, to secret oaths, and to secret proceedings. – John F. Kennedy
I claim that human mind or human society is not divided into watertight compartments called social, political and religious. All act and react upon one another. – Mahatma Gandhi