Homo Erectus

A caveman wants more out of life, including his brother's hot wife and leadership of the tribe.

From the number of stars some other reviewers have assigned, I have to think they were associated with the movie in some way. It's just not that funny. The idea is somewhat original, with the caveman theme, but the jokes are totally predictable: cavemen clubbing women, prehistoric animals wreaking havoc, and sight gags like cavemen wearing modern eyeglasses.

It's one of those movies you might watch if it was the only thing on TV late at night when you couldn't go out and get a rental.

The protagonist, Caveman Isbo, has a string of failed inventions and a crush on his brother's hot wife. He can't get the cave women interested in him and his inventions don't spark any interest with the tribe. He does a lot of moping around, trying to solve his problems.

It's a good idea, and almost funny enough to capture your interest, but not quite. If you're into National Lampoon humor you can probably watch it, but it won't be one you recommend to friends.