The reality is, due to their cultural and education style backgrounds, westerners tend to be more assertive and determined clearly better leadership skills.
This is not a racist comment. There are studies about behavior in different cultures and there are huge differences!
No point arguing this here, as obviously those who question do not understand and/or accept the facts.
We are all humans, but shaped by education and culture in different ways!

I leave you with the cultural dimensions that Geert Hofstede choose to classify cultures and their behaviors:
(source: http://www.geert-hofstede.com/)

Power Distance Index (PDI) that is the extent to which the less powerful members of organizations and institutions (like the family) accept and expect that power is distributed unequally.

Individualism (IDV) on the one side versus its opposite, collectivism, that is the degree to which individuals are inte-grated into groups.

Masculinity (MAS) versus its opposite, femininity, refers to the distribution of roles between the genders which is another fundamental issue for any society to which a range of solutions are found.

Uncertainty Avoidance Index (UAI) deals with a society's tolerance for uncertainty and ambiguity; it ultimately refers to man's search for Truth.

Long-Term Orientation (LTO) versus short-term.

This is what Hofstede found about Canadians (culture and education):
Canada has Individualism (IDV) as the highest ranking (80) Hofstede Dimension, and is indicative of a society with a more individualistic attitude and relatively loose bonds with others. The populace is more self-reliant and looks out for themselves and their close family members. Privacy is considered the cultural norm and attempts at personal ingratiating may meet with rebuff.
The majority of Canadians, as well as citizens of other English speaking countries, (see United Kingdom, Australia, New Zealand, and the United States) have Individualism as their highest ranking Dimension.
Among high IDV countries, success is measured by personal achievement. Canadians tend to be self-confident and open to discussions on general topics; however, they hold their personal privacy off limits to all but the closest friends.