From what part of the world? The African tribes? The AmerIndian tribes? The Hebrew tribes? Which? We need some directions here.
BAKONGO (northern-Angola)
the octopus is considered the smartest of ALL invertebrates
Lex Luthor is usually considered the smartest character, at least the smartest on Earth. Brainiac is also considered the smartest character. I would say it's Brainiac then Luthor. Oddly enough both are Superman villains.
Aberham Lincoln
I have no idea! Beacause..
Massachusetts
a monkey
california
Yes, monkeys are quite smart. They are considered to be the smartest animal apart from us. Mind you, most animals are smart anyway.
black
They chose their leaders by letting the elders examine the strongest, fastest, smartest and most skill full of all the Aleuts.
the superlative of smart is smartest