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>Why are we not united?
Hmm?
>It is stupid to fight each other.
Usually. I think more people are becoming of the opinion that diplomatic solutions are usually better than getting into physical conflicts.
If you are asking why we oppose each other at all, it's because we can't all agree. We all have different opinions on what is good, what is bad, and what level of altruism people are supposed to have.
>All Nations want to have the primacy of something that. That is the cause of famine, war, etc.
I agree to an extent. If everyone was perfectly altruistic, then there would be much less fighting.
Hypothetically speaking, there could still be fighting, like in iRobot, where the machines dominate humanity and kill some of them because they coldly decided what was best.
>We are human. We don't need a bigger television or a more beautiful dress.
That's the animal part of us that isn't logical - most of our wants. We want a big television that is going to stimulate all of our friends well enough, so they don't leave us. We want the most beautiful dress, to show our status and fend off the lower mates. It's just what animals do.
>We need to understand each other and to stay together
To an extent, yes. If you want to learn more about this, you should study sociology.