The philosophies of Søren Kierkegaard and Miguel de Unamuno were born within turbulent times and the rise of naturalism. As a result, they both embraced subjectivity and individualism. While the two used indirect communication to explore similar ideas, they both had very different concepts of the self, religion, and the process of making yourself a self. While Kierkegaard viewed the process of self-actualization as a mostly linear path of conquering three stages or realms of existence, Unamuno viewed these same stages as mere aspects of human existence, viewing self-actualization as distinct for every individual but generally consisting of striving for more than one is.
Chumley, Allyson, "Dios, Søren Kierkegaard, y Miguel de Unamuno: desarollando el propio Yo" (2023). World Languages and Cultures Senior Capstones. 10.