In his novel The Yiddish Policemen Union, Michael Chabon utilizes an"unnatural" narrative to construct the novel’s "unnatural" space. Presenting the Jewish savior "Messiah" from multiple angles, he writes an "unnatural" Jewish "alternative history".This involves fantastical narrative spaces, multiple social spaces, and an unnatural "border space", thus foregrounding a persistent theme in Jewish literature: Jewish existential crisis.