Thank you for this audio, a beautiful revision on, Goodwill: The will has to be on categorical imperative, and is rationally free from influence. The necessity of it is in principle of it's Autonomy being free from influence and thus, conformed to rational morals of universal law. Reason and understanding .
That is interesting, I have studied Kant since my early teenage years, and generally, I am known to understand it very well. However, I am starting to question the practical benefit of concepts such as cosmopolitanism. Moreover, I find nature to present more examples of moral behaviour than the moral law considered applicable by man/woman nowadays.
A cosmopolitan world would somewhat nullify the freedom to be oneself and act in accordance to one's conscious, and one political system or religious orientation being applied globally would unavoidably breach the categorical imperative because it would violate the rights of the ones whose political system and religion is irradiated, therefore, not universally applicable.