they lost it to mixed immigrantz...pretty simple if you ask me.
anywayz, there'z alotta civilizationz that deserve some recognition...but the onez that stick out in my mind...
egyptians- they were one of the first highly developed civilizationz and could obviously design (pyramids).
greeks- they made alot of advances including developing one of the first types of democracy.
romans- pretty self-expanitory...the romans created one of the largest empires the world has ever seen.
russians- also created a vast empire, and became a force to contend with.
british- yea, i'm gonna give their just dues.
they also created a vast empire, and plus i know some cool people from there.
america- this shouldnt need an explanation from me...but yea, america iz one awesome superpower.
and...i dont feel like typing more right now.