Long story short Sousei no Taiga is a Seinen version of Dr Stone. And it does it's job well. =World= 10 =Story= 10 =Characters= 5 MC too OP, MC has harem, there isn't anyone comparable to MC in greatness, OPness, usefulness, chadness and the like. Theres one impressing leader neanderthal, a useful blacksmith, and very nimble and strong female neanderthal. Unfortunately you could say everyone except these 4 characters is either a cannon fodder or a filler.=Art Quality= 6
I like the art, but its low resolution, is making it look bad if someone wants to be picky

=Art Style= 10
The style is absolutely great and fits this manga's dark and brutal story.