According to social scientist Richard Wilkinson, among the rich countries of the world: Group of answer choices Differences in inequality within countries don't matter for well-being, but differences across countries in GDP per capita matter a lot Both GDP per capita between countries and levels of inequality within countries matter a lot for well-being Differences between countries in GDP per capita don't matter for well-being, but levels of inequality within countries matter a lot Neither differences in GDP per capita across countries nor inequality within countries matters much for well being