Existential/philosophical/political but easily accessible

Please don't read this if you don't want to be confused or frustrated.

I am looking for books that satisfy the existential questions I have about the world and people. I want something that is easy to read (not in terms of emotions but in terms of not having to read every sentence over multiple times) and ideally less than 300 pages. I lean quite left and generally like to read books by anarchist/socialist writers. The questions/concepts I want to read about are as follows:

• How many people will say that the 'don't want people to die' but continue to support things that kill and try to justify it. I find it interesting how people that I disagree with will agree with my morals on a simple level but end up with a different conclusion. How do I know that my route to my own conclusion is the correct one? And how do I know when I should keep someone in my life that I disagree with? When does someone become a bad enough person?

• Not being able to know what is true. For example you can read things in the news but different people read different things so how do you know what is true without spending your whole life studying it? Even then you do not know what is true. Everybody hears things once and believes it and you can't get through life without doing this but you also can not justify everything as a result.

• why is the world the way it is? As in, why are specific areas of the world less well off and why are the people in power the ones in power? I have a hard time consuming history books and podcasts and I know that would help answer these questions but unfortunately I can't get myself to read them. I think it's because I would have to understand all of history to get there and I want someone who already understands it to help explain it. Or it could also be that history doesn't help answer this question because I could just keep asking why about every explanation.

• how are people supposed to have hope when all signs point to negative outcomes?

• why is everyone so quick to think that doing one wrong thing makes someone a bad person? Why are we so scared of doing one wrong thing and the backlash that comes with it?

Sorry these are so broad and vague. I'm open to different interpretations of what I'm asking for and to books that touch upon a specific concept/ historical event that still try to address these questions. Im really interested in how brains work and crave explanations for things that make no sense. I'm not really looking for self help though, but instead psychology/history/philosophy based books that try to make sense of these topics that will never make sense. Fiction and non fiction work too.