The naivete of everyone is somewhat understandable because each generation lets new technology (e.g. telegraph, airplanes, internet, etc) seduce them into thinking its capabilities will help humans understand each other.
Some examples of previous naive forecasts:
>"telegraph [...] would end international hostilities [...] the telegraph wire, the nerve of international life, transmitting knowledge of events, removing causes of misunderstanding, and promoting peace and harmony throughout the world."[1]
>"With the perfect development of the airplane, wars will be only an incident of past ages."; "The Wright Brothers Invention Should Prevent Further Wars And Insure Peace"[2]
>"the internet will help us connect with each other and let us discuss our differing viewpoints!"[3]
And no doubt that if some future 22nd-century technology of brainwave-telepathic device is invented, those future people will think that magical thought-communicator will enable peace and harmony. Why would there be any wars if 10 billion of us could just magically send thoughts with universal language translation without even speaking or writing?!? (Don't worry, humanity will figure out a way to use the device for spreading hate.)
[1] https://books.google.com/books?id=4y2UAgAAQBAJ&pg=PA16&lpg=P...
[2] https://wrightstories.com/wrights-perspective-on-the-role-of...
[3] today's internet users
Find something that has a proven track record of yielding to intervention, and then intervene there. It’s not sexy to prevent parasitic worm infections, but it does more good than all of SV combined. It’s not sexy to sit in rooms with a bunch of politicians and diplomats and struggle to make microscopic improvements, but it adds up.
The problem is that people in places like this don’t just want to save the world. They want to save the world in their lifetimes, while getting filthy rich, and in no way compromising their ideals. Nobody wants to sacrifice anything, they want improvements to be universally beneficial and personally gratifying. They don’t talk about carbon taxation or cutting down consumerism, regulation or compromise; it’s talk of self-driving electric cars and fusion plants and living on Mars. The only seriously entertained notions are the ones that somehow make the world a better place without making you miss a beat in your lifestyle.
[0] https://www.microsoft.com/en-us/research/wp-content/uploads/...
Another example would be "Nation shall speak peace unto nation", the BBC motto from 1927, round about the time Dr. Goebbels was using radio to speak a distinctly unpeaceful message.
I think it’s more likely that violent conflict arises from actual conflicts of interest or belief. Closer contact might exacerbate those problems instead of fixing them...