Many historians contend that Hitler's essential character and political philosophy can be discovered in "Mein Kampf". Historian James Joll once claimed that "Mein Kampf" constituted "all of Hitler's beliefs, most of his programme and much of his character". According to Andreas Hillgruber, evident within the text of "Mein Kampf" is nothing less than the very crux of Hitler's program. One of Hitler's foremost goals was that Germany should become "a World Power" on the geopolitical stage, or as he stated, "it will not continue to exist at all". Biographer Joachim Fest asserted that "Mein Kampf" contained a "remarkably faithful portrait of its author".