Lurie indeed did not find his job easy. "My biggest problem was how to find a common denominator among one billion people, which is why I drew so many drafts."
而實際上，勞瑞在創作期間，也的確遭到很多困難，「我最大的問題是：如何找到十億人的共同點然後把它畫出來，這也是我九次更動稿子的原因。」