"How are you going to save the world? How find a straight road of progress, you men of science, of industry, of cooperation, of trades unions, and all the rest? How are you going to save it, I say? By what? By credit? What is credit? To what will credit lead you?’
‘You are too inquisitive,’ remarked Evgenie Pavlovitch.
‘Well, anyone who does not interest himself in questions such as this is, in my opinion, a mere fashionable dummy.’
‘But it will lead at least to solidarity, and balance of interests,’ said Ptitsin.
‘You will reach that with nothing to help you but credit? Without recourse to any moral principle, having for your foundation only individual selfishness, and the satisfaction of material desires? Universal peace, and the happiness of mankind as a whole, being the result! Is it really so that I may understand you, sir?’
‘But the universal necessity of living, of drinking, of eating— in short, the whole scientific conviction that this necessity can only be satisfied by universal cooperation and the solidarity of interests—is, it seems to me, a strong enough idea to serve as a basis, so to speak, and a ‘spring of life,’ for humanity in future centuries,’ said Gavrila Ardalionovitch, now thoroughly roused.
‘The necessity of eating and drinking, that is to say, solely the instinct of self-preservation...
‘Is not that enough? The instinct of self-preservation is the normal law of humanity...’
‘Who told you that?’ broke in Evgenie Pavlovitch.
‘It is a law, doubtless, but a law neither more nor less normal than that of destruction, even self-destruction. Is it possible that the whole normal law of humanity is contained in this sentiment of self-preservation?’"

Fyodor Dostoyevsky - The Idiot