The French nineteenth-century statesman Alphonse de Lamartine wrote an ode to European unity along rationalist lines, entitled the Marseillaise of Peace: “In the course of enlightenment, the world rises to unity/I am the fellow citizen of every thinking person/Truth is my country.” As France’s foreign minister in the revolutionary year of 1848, Lamartine published his Manifesto for Europe, promoting not just European unity, but that of mankind.
启蒙运动后，理性主义很容易地就吸收了宗教普世主义。19世纪法国政治家拉马丹用理性主义的笔调写过一篇欧洲统一赋，题为《和平马赛曲》（Marseillaise of Peace）：“在启蒙过程中，世界走向了统一/所有思想者都是我的同胞/真理就是我的祖国。”在爆发大革命的1848年，出任法国外交部长的拉马丹出版了《欧洲宣言》（Manifesto for Europe），鼓吹不但要统一欧洲，还要统一全人类。