You can solve any brief with an image of hands. Handprints were the first marks early humans left on the walls of caves. Way before we had learnt to make drawings with tools we could make patterns with our muddy hands.
Everyone has individual hand- and fingerprints. They are a record of our uniqueness, used both by police to identify criminals and to celebrate achievement and fame when celebrities press their hands into wet cement in public ceremonies in Hollywood.
F. H. K. Henrion, Poster for the United States Office of War Information, 1944 Four hands representing the nations of Russia, US, France and Britain smash fascism. Henrion was ...