[T]he evidence from anthropology concurs with history in refuting the popular belief in a Jewish race descended from the biblical tribe. From the anthropologist's point of view, two groups of facts militate against this belief: the wide diversity of Jews with regard to physical characteristics, and their similarity to the Gentile population amidst whom they live. Both are reflected in the statistics about bodily height, cranial index, blood-groups, hair and eye colour, etc. Whichever of these anthropological criteria is taken as an indicator, it shows a greater similarity between Jews and their Gentile host-nation than between Jews living in different countries. ...The obvious biological explanation for both phenomena is miscegenation, which took different forms in different historical situations: intermarriage, large-scale proselytizing, rape as a constant (legalized or tolerated) accompaniment of war and pogrom.
 
    
        Arthur Koestler 
     
    
     
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        The city is very different from the country, girl. It is a kind of shared consciousness that begins its work on you as soon as you enter it, if not well before, a consciousness that begins to separate you from the country possibly even before you decide to journey toward it. It encircles you with forces much greater than the walls and gates which imitate tinier villages or towns. People who come to it come seeking the future, not realizing all that will finally affect them in it is their own, only more or less aware, involvement with the past. The way we do things here-really, that's all there is to be learned in our precincts. But in the paving of every wide, clear avenue, in the turnings of every dark, overhung alley, in the ornaments on every cornice, in the salt-stained stones of each neighborhood cistern, there are traces of the way things once were done-which is the key to why they are done as they are today. 
         
 
    Samuel R. Delany 
 
                 
            
        
     
    
    
                                        
                    
    
        A number of proposals have been advanced in recent years for the development of ‘general systems theory' which, abstracting from properties peculiar to physical, biological, or social systems, would be applicable to all of them. We might well feel that, while the goal is laudable, systems of such diverse kinds could hardly be expected to have any nontrivial properties in common. Metaphor and analogy can be helpful, or they can be misleading. All depends on whether the similarities the metaphor captures are significant or superficial.
It may not be entirely vain, however, to search for common properties among diverse kinds of complex systems... The ideas of feedback and information provide a frame of reference for viewing a wide range of situations, just as do the ideas of evolution, of relativism, of axiomatic method, and of operationalism... hierarchic systems have some common properties that are independent of their specific content... 
         
 
    Herbert Simon 
 
                 
            
        
     
    
    
    
    
                                        
                    
    
        From what can "ought" be derived. The most compelling answer is this: ethics must be somehow based on an appreciation of human nature - on a sense of what a human being is or might be, and on what a human being might want to have or want to be. If that is naturalism, then naturalism is no fallacy. No one could seriously deny that ethics is responsive to such facts about human nature. We may just disagree about where to look for the most compelling facts about human nature -n novels, in religious texts, in psychological experiments, in biological or anthropological investigations. The fallacy is not naturalism but, rather, any simple-minded attempt to rush from facts to values. In other words, the fallacy is greedy reductionism of values to facts, rather than reductionism considered more circumspectly, as the attempt to unify our world-view so that out ethical principles don't clash irrationally with the way the world is. 
         
 
    Daniel Dennett