Top Ten defining Moments of the ' first decade '....I'm going to assume you mean the first decade of man ...
at number 10: Ugh learns that it's not good to eat his own flesh
at number 9: Erg learns that it's not OK to copulate with an angry Mammoth, but a happy one doesn't care
at number 8: Ugine discovers that toe jam has a very peculiar taste when you haven't washed your feet for weeks
at number 7: GeminiBrian realizes that he is not evolving with the other primates
at number 6; Ugh discovers water and uses it to throw on Sabertooths for fun
at number 5: Ugine tells Ugh that that isn't what water is for and proceeds to show him that if you throw it off a cliff it makes rain
at number 4: Erg finds a round rock and rolls it on the ground and creates bowling night
at number 3: Ugh takes rock away from Erg and gives it to Ugine creating the first pet rock
at number 2: Ugh and Ugine elope to Las Vegas
and the number one defining Moment of the ' first decade '
( drum roll )
Erg, all alone now, dejected, goes on a quest to find the answers to life...wandering endlessly he finally comes across another round rock like he used to have and mutters ' gawd '
and religion was born.