 
                            
                        
                        
                        Source: Better-World Philosophy: A Sociological Synthesis (1899), Egoism and Altruism, pp. 120–121
            "Modern Ethics", pp. 268–269 
The Universal Kinship (1906), The Ethical Kinship
        
Source: Better-World Philosophy: A Sociological Synthesis (1899), Egoism and Altruism, pp. 120–121
Source: You Can Change the World (2003), p. 68.
                                        
                                         review of The Flying Sorcerers by David Gerrold and Larry Niven http://jamesdavisnicoll.com/review/exhibit-a, 2016 
2010s
                                    
“The evolution of man is the evolution of his consciousness.”
                                        
                                        In Search of the Miraculous (1949) 
Context: In speaking of evolution it is necessary to understand from the outset that no mechanical evolution is possible. The evolution of man is the evolution of his consciousness.
                                    
The Art of Doing Science and Engineering: Learning to Learn (1991)
The Third Culture: Beyond the Scientific Revolution (1995)
Nonzero: The Logic of Human Destiny. New York: Pantheon Books, 2000, p. 323.
 
                            
                        
                        
                         
                            
                        
                        
                        