Is Western way of life antithetical to human nature?

Creatures living in their natural environment tend to procreate at a high rate resulting in a rise in their population. When deer, lions, wolves, zebras, species of fish and plants and other living creatures are in their natural habitat, their population rises. 

Thus, we can define natural habitat for a particular species as an environmental ecosystem which enables faster procreation and, thereby, rise in the population of the species. What does this definition of natural habitat tell us about humans and their societies? 

It tells us that the Western way of life is antithetical to human nature— it leads to decline in birth rate and paves way for the decimation of the original population. In every nation founded on the Western model the death rate is higher than the birth rate. 

Even the Asian countries which made the mistake of adopting the Western model, and diluting their original culture, are facing steep decline in their birth rate. In Japan, the birth rate has dropped to 1.26 births per woman, which is far below the death rate. 

All nations with high birth rates are non-Western. In fact, the degree of decline in population in nations is directly proportional to their level of Westernization. More Westernized a nation is, the sharper the decline in birth rate that it faces.