本片是一部美国剧情片，由大卫·格里菲斯导演，由W. Chrystie Miller/罗伯特·哈伦/梅·马什主演。
剧情简介：A man tells his grandchildren about prehistoric man. Weakhands is unable to court a woman because of his physical weakness. Humiliated by Bruteforce, he bumps into Lillywhite, who has also been cowering since her mother died. But when they venture out in search of breakfast, Bruteforce separates the couple and sends Weakhands scrambling into a cave. There, he hits upon the design for a club: A rock on the end of a stick. With this equalizer, he soon vanquishes Bruteforce and wins Lillywhite back again.
外文名：Man's Genesis
类型：剧情 / 短片 / 冒险
地区：美国
导演：大卫·格里菲斯
编剧：大卫·格里菲斯 / 杰克·伦敦 / 弗兰克·伍兹
演员：W. Chrystie Miller / 罗伯特·哈伦 / 梅·马什 / 威尔弗雷德·卢卡斯 / 查尔斯·希尔·梅尔斯 / 克莱尔·麦克道尔 / W.C. Robinson
