Is world peace possible or are we doomed to struggle?

Believe it or not, we're living in the most peaceful period of human history thus far. I'd recommend the book The Better Angels of Our Nature by Steven Pinker which talks about how far we've come. That said, I see the threat of global warming, lack of fresh water, famine, and energy scarcity becoming threats to the current status quo, though. If we don't figure some things out as a species, we're likely in for some turbulent times in the next hundred years.

The world is fighting fewer wars than ever in history. That doesn't mean there are no wars, they're just much fewer in number compared to the past.

While world peace is obviously desirable, I think it's important to recognize that the absence of conflict does not imply the presence of justice. World peace should not be pursued until we first achieve universal justice, because pursuing universal justice will require war.

Stopping wars while we live in an unjust international order does nothing but solidify that order and demonize opposition to it as "warmongering". Some wars are just. The Allies could have avoided a lot of bloodshed had they invaded Germany to immediately depose Hitler, rather than allowing him to solidify his power, grow Germany's military, and invade Poland and Czechoslovakia.

The end of war will naturally follow the end of inequality and injustice.

Peace isn't possible without the abolition of borders.

And sadly the powers that be rely on borders to stay in power.

Humans gotta human, and I'll fight anyone that says otherwise.

A lot of people will blame conflicts on power hungry individuals, on war profiteering, or on relatively simple characterizations of cultural prejudice ("Americans hate brown people!"). There's truth in these viewpoints, but they're limited by being framed in current sociocultural issues.

It's very important to understand that there are ancient cultural feuds that people who were born and raised in the US are mostly ignorant of. For instance, India and China.

The reason that Afghanistan is such a mess internally today is that it was never a cohesive national culture in its history. The people who live there are comprised of many different cultural groups, many of whom are the descendants of various groups of invaders throughout the region's history - and as such, many of the groups hate each other due to past territorial conflicts.

Every place you might look at in the entire world, the history is like this - an endless fractal of groups trying to conquer each other, or running away from some other conquerors and getting into conflict with the locals whose land they ran away to. It goes all the way back to the time that the first hominid picked up a rock and hit another one over the head. The conflicts are so old that no one remembers how, why or when they started, but the fear and the hatred remain.

These conflicts aren't the product of modern international economic competition or ideological differences (capitalism v socialism, etc) or nationalist political division. Rather, the modern competition, differences and division exist today as an expression of the old conflicts.

To get to the world of peace that you have in mind, it would be necessary to wipe the slate of history clean.

I was thinking about how we (USA) are always in continuous (ghost) wars and never try to negotiate for peace, to my knowledge.

The US has supported or started many pointless wars, but that we have never negotiated for peace or avoided war is not accurate. One example is that the US, as part of the UN, participates in peacekeeping efforts across the world.

One country and one languague or would a world power have to forcibly join everyone together?

So, you know that 'one world government' is a thing that terrifies a lot of religious conservatives because they think it means the antichrist and the end of the world, right? The language thing is difficult too. From what i recall the most common language worldwide is Spanish, with 2.5-3 billion people speaking it, which means 5 billion or so people would have to learn Spanish, or we'd have to pick some other language and even more people would have to learn that. (EDIT: oops, English is #1 followed by Mandarin. I somehow confused Spanish with Catholicism)

I agree that nationalism is harmful, but overall it would be very, very difficult to persuade every country in the world to give up their language and national identity. Also, as central planning doesn't work very well, any world government would have to be segmented to provide effective governance for regions, which would mean basically... like now... each region has it's own government.

Most likely the reasonable thing to do would be to try to encourage countries to work together peacefully, rather than try to abolish nations.

Its not really about warfare, but abbout divisions, and mostly class divisions, be it political or economical. And goverment always becomes corrupt and at least in the case of the main 3 superpowers, starts getting into shit that doesnt really concern them, be it cold war shit like the contras or the mujahadin or be it espionage and the taking down of sovering states to install their own pupet governments for banana companies among other stuff and whatever the hell the soviets where doing. Thats why i propose that we should create an A.I. overlord so that it replaces human leadership and distributes resources as needed (by persons) and exploits them in a sostainable way. But not A.I. like the language models that we have, no, im talking singularity type shit, but there has been good progres with what we have right now. And i believe the fate itself of humankind rest on the fact that we build such A.I. since we as humans have proven uncapable of governing ourselves without mass murder, starvation, fear and inequality.

I think Arthur C. Clarke wrote a novel about that? CHILDHOOD'S END.