Todd McCarthy Quite like the scorpion that stings the frog that’s offered to transport it to the other side of the river, simply because it’s in its perverse nature to do so, so does Martin Eden offer up an ultimately caustic view of human endeavor that gives the heave-ho to constant striving and the best intentions.This vividly rendered Italian take on Jack London’s 1909 novel brandishes a cutting intelligence and a powerful star turn by Luca Marinelli, whose performance earned him best actor