What was the original French title of the book by philosopher Henry Bergson which is based on a hypothetical explanation for evolution and development of organisms?
Élan vital:  It is a hypothetical explanation for evolution and development of organisms, which Bergson linked closely with consciousness – with the intuitive perception of experience and the flow of inner time. Creative Evolution (book): Creative Evolution (French: "L'Évolution créatrice" ) is a 1907 book by French philosopher Henri Bergson.
L'Évolution créatrice