No, you didn't.
The OP did, or, rather, cited a book claiming everything originated in Africa - Sub Saharan, of course - even the Pyramids and....... Olmec statues! From Central America! Those heads are African because them White dudes who played Indians fighting John Wayne had thin Anglo lips!
The meme is not about the gas mask, blood transfusion, or refrigerated trucks in 20th Century America - but the ROOTS of everything from architecture to zoology.
The Colonial Era is over. Mostly. The USA itself is a product of it. You don't see us all a scramble like they are in Mexico, Brazil, and Venezuela and the rest of South of the Border. Nor are we pointing our fingers at England blaming them for our problems. Heck, we turned the UK into OUR dependent child.
What's all these other countries excuses? Is the yoke of their former colonists like Portugal and Spain - themselves in a downward spiral till the EU came along - really THAT heavy?