The limits of democratization discussed in this book reflect the evolved diversity of life. This means that all nations do not have equal chances to establish and maintain democratic systems. A central conclusion is that it is probably never possible to achieve the same level and quality of democracy in all countries of the world because of the impact of the two ultimate constraining factors (annual mean temperature and national IQ), which are outside conscious human control. We should learn to accept the fact that because of the evolved human diversity, we are bound to live in a world of many kinds of disparities, including inequalities in the quality of democracy and in the possibilities to enjoy similar political rights and civil liberties.