I never heard of this one before?
The Kondratieff cycle
The sum of the 4 generations is called a saeculum, it is from 70 to 80 years in length, or the length of time it takes the grandfathers to pass away from the scene....
$this->bbcode_second_pass_quote('', 'T')he Fourth Turning, by Howe and Strauss. That book describes how any society goes through four stages of development. The first is the survivor, creator generation. The second is the children of them, they continue and boost the creativity of the first sacrifice generation. The third is a consumption driven, flaccid generation. The fourth is the loser generation destined either for war or economic collapse, they are losers because they have none of the personal discipline that the first sacrificial and creative generation had.
After the fourth turning, the society begins to raise itself from the ashes of the old flaccid one. That is, if they are not conquered by enemies, or die off in some plague... (both of these have happened and ruined societies).


