acceptance of eternal recurrence raises the question of whether it could justify a trans-valuation of one's life, and be a necessary precursor to the overman in his/her perfect acceptance of all that is, for the love of life itself and amor fati. Interpretations In contemporary Nietzschean scholarship, some interpreters have emphasized the will to power as a psychological principle because Nietzsche applies it most frequently to human behavior. However, in Nietzsche's unpublished notes (later published by his sister as "The Will to Power"), Nietzsche sometimes seemed to view the will to power as a more (metaphysical) general force underlying all reality, not just human behavior—thus making it more directly analogous to Schopenhauer's will to live. For example, Nietzsche claims the "world is the will to power—and nothing besides!". Nevertheless, in relation to the entire body of Nietzsche's published works, many scholars have insisted that Nietzsche's principle of the will to power is less metaphysical and more pragmatic than Schopenhauer's will to live: while Schopenhauer thought the will to live was what was most real in the universe, Nietzsche can be understood as claiming only that the will to power is a particularly useful principle for his purposes. Some interpreters also upheld a biological interpretation of the Wille zur Macht, making it equivalent with some kind of social Darwinism. For example, the concept was appropriated by some Nazis such as Alfred Bäumler, who may have drawn influence from it or used it to justify their expansive quest for power. This reading was criticized by Martin Heidegger in his 1930s courses on Nietzsche—suggesting that raw physical or political power was not what Nietzsche had in mind. This is reflected in the following passage from Nietzsche's notebooks: Opposed to a biological and voluntary conception of the Wille zur Macht, Heidegger also argued that the will to power must be considered in relation to the Übermensch and the thought of eternal recurrence—although this reading itself has been criticized by Mazzino Montinari as a "macroscopic Nietzsche". Gilles Deleuze also emphasized the connection between the will to power and eternal return. Both Jacques Derrida and Gilles Deleuze were careful to point out that the primary nature of will to power is unconscious. This means that the drive to power is always already at work unconsciously, perpetually advancing the will of the one over the other. This thus creates the state of things in the observable or