Ethnogenesis and the Biosphere by Lev Gumilev http://gumilevica.kulichki.net/English/ebe.htm http://gumilevica.kulichki.net/English/ebe.htm Surprisingly, not o

Ethnogenesis and the Biosphere by Lev Gumilev http://gumilevica.kulichki.net/English/ebe.htm http://gumilevica.kulichki.net/English/ebe.htm Surprisingly, not only ethnoses have an age, but their growth, development and aging follows a fairly common trajectory.