subject matter, locality, and personal background. Generally, the Flemish will seldom identify themselves as being Dutch and vice versa, especially on a national level. This is partly caused by the popular stereotypes in the Netherlands as well as Flanders, which are mostly based on the "cultural extremes" of both Northern and Southern culture, including in religious identity. Though these stereotypes tend to ignore the transitional area formed by the Southern provinces of the Netherlands and most Northern reaches of Belgium, resulting in overgeneralizations. This self-perceived split between Flemings and Dutch, despite the common language, may be compared to how Austrians do not consider themselves to be Germans, despite the similarities they share with southern Germans such as Bavarians. In both cases, the Catholic Austrians and Flemish do not see themselves as sharing the fundamentally Protestant-based identities of their northern counterparts. In the case of Belgium, there is the added influence of nationalism as the Dutch language and culture were oppressed by the francophone government. This was followed by a nationalist backlash during the late 19th and early 20th centuries that saw little help from the Dutch government (which for a long time following the Belgian Revolution had a reticent and contentious relationship with the newly formed Belgium and a largely indifferent attitude towards its Dutch-speaking inhabitants) and, hence, focused on pitting "Flemish" culture against French culture, resulting in the forming of the Flemish nation within Belgium, a consciousness of which can be very marked among some Dutch-speaking Belgians. Genetics The largest patterns of human genetic variation within the Netherlands show strong correlations with geography and distinguish between: (1) North and South; (2) East and West; and (3) the middle-band and the rest of the country. The distribution of gene variants for eye colour, metabolism, brain processes, body height and immune system show differences between these regions that reflect evolutionary selection pressures. The largest genetic differences within the Netherlands are observed between the North and the South (with the three major rivers – Rijn, Waal, Maas – as a border), with the Randstad showing a mixture of these two ancestral backgrounds. The European North-South cline correlates highly with this Dutch North-South cline and shows several other similarities, such as a correlation with height (with the North being taller on average), blue/brown eye colour (with the North having more blue eyes), and genome-wide homozygosity (with the North having lower homozygosity levels). The