I FORGOTWHOTOLDMETHISBUTIVEBEENTOLD

Did I read it? If so I can't tell who wrote that,it goes like this:
Merging from a savage world,here comes the weakling,the most feeble and ridiculously awkward animal you can find on earth: Man-and he survived,with caring for his family,uniting with his kind,joining forces with other species and fighting the cave-bears,the saber-tooth and the lions,fighting the snakes,fighting this and fighting that 'till his rage faces nothing but his own
specie----Hey!! STOP IT--That's it man,lets take five-hear me-we've won the earth,it's ours-
Saber-tooth's gone and we have to protect the few tigers,lions,elephants and gorillas left here-
THE EARTH IS OUR GARDEN AND ALL WE HAVE TO DO IS TO KEEP IT BEAUTIFUL-

WE'VE WON, IT'S OURS, WE CAN STOP FIGHTING.......WE OWN IT ALL.

MAN WON !!