One who is caught in thought loses one's original nature. All he knows are words and descriptions. When he sees the actual thing, he fails to perceive it.
Our world and our lives have become increasingly interdependent, so when our neighbour is harmed, it affects us too. Therefore we have to abandon outdated notions of 'them' and 'us' and think of our world much more in terms of a great 'US', a greater human family.
If you can cultivate wholesome mental states prior to sleep and allow them to continue right into sleep without getting distracted, then sleep itself becomes wholesome.
We must openly accept all ideologies and systems as a means of solving humanity's problems. One country, one nation, one ideology, one system is not sufficient.