Hitler's foreign policy strategy can be divided into two main concepts: race and space. In 1928, Hitler dictated the text of a follow-up text to "Mein Kampf" focused on the elaboration of the foreign policy concepts he had previously set forth. Unedited and unpublished, it allows a clearer picture of Hitler's thoughts than the edited and revised "Mein Kampf" or his populist and over-simplified speeches. There is a lack of development or major shifts in his worldview between the 1926 volume and his assumption of power in 1933, supporting the idea that Hitler was not a foreign policy opportunist but that his ideas were specific and formed before he had the power to implement his designs.