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  PRIMEVAL 
  MAN. 
  

  

  dation." 
  Yet 
  nothing 
  in 
  the 
  Natural 
  History 
  

   of 
  Man 
  can 
  be 
  more 
  certain 
  than 
  that 
  both 
  

   morally, 
  and 
  intellectually, 
  and 
  physically 
  he 
  

   can, 
  and 
  he 
  often 
  does, 
  sink 
  from 
  a 
  higher 
  

   to 
  a 
  lower 
  level. 
  This 
  is 
  true 
  of 
  Man 
  both 
  

   collectively 
  and 
  individually—of 
  men 
  and 
  of 
  

   societies 
  of 
  men. 
  Some 
  regions 
  of 
  the 
  world 
  

   are 
  strewn 
  with 
  the 
  monuments 
  of 
  civilizations 
  

   which 
  have 
  passed 
  away. 
  Rude 
  and 
  barba- 
  

   rous 
  tribes 
  stare 
  with 
  wonder 
  on 
  the 
  remains 
  

   of 
  Temples, 
  of 
  which 
  they 
  cannot 
  conceive 
  

   the 
  purpose, 
  and 
  of 
  Cities 
  which 
  are 
  the 
  dens 
  

   of 
  beasts. 
  It 
  is 
  not 
  necessary 
  to 
  assume, 
  as 
  

   it 
  has 
  sometimes 
  been 
  assumed, 
  that 
  there 
  

   is 
  a 
  law 
  of 
  decay 
  affecting 
  communities 
  as 
  

   certain 
  in 
  its 
  operation 
  as 
  the 
  law 
  which 
  

   operates 
  on 
  the 
  individual 
  frame. 
  It 
  is 
  enough 
  

  

  