Hi
There many rules John Smith instituted in Jamestown, but the most common one was, "He would does not work, shall not eat".
        
                    
             
        
        
        
Its mostly a stylistic choice although at one points it was mostly a heat related idea. Hot air rises so having a steep roof allowed for the accumulation of hot air. It was also a good windbreaker so a collection of houses were able to stop a lot of the harsh wind from damaging things. 
 
        
                    
             
        
        
        
Answer:
1.) 36 alien civilizations could communicate with us.
2.) The nearest alien could be on Mars which is 54.6 million kilometers
away.
3.) No I don't agree. There could be millions of alien civilisations out there that we haven't found because space is so big.