civilization types revisited

             
                                           
                                             
Presented in this video is a general explanation of    
civilization types by Dr. Michio Kaku.                                   
                                              
This Kardashev scale article at Wikipedia details  
the speculation of civilization types and indicates  
where the human race was as of 2007.               
                                                      
                                                   
                                                  
                                               
                                                 
                                          
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