Thats life: the cities may be bright and the stuff we have now may be awesome as far as technological and civilization advancement go, However when you look behind the curtain you see that the world is a horrible messy place driven by greed, the lust for power and the need to obtain more resources or power by theft or by force; And thats how the world has been run for roughly 4,000 years AND IS STILL RUN. Craziest thing ever though 60% of the 7.4 BILLION people on planet earth live in poverty. 40% of the entire population live with out access to clean drinking water. All you have to do to get drinking water is take ocean water filter out the solid particulate, remove any chemical pollutant and distill it to remove the salt and re fortify it with minerals. THATS LITERALLY ALL YOU HAVE TO DO. (Oh an 70% of the planet is covered with ocean water) So poverty yea thats a tougher problem to fix. Clean drinking water ALL you need is a few filters, boil it to steam and collect that steam, then put needed minerals back into the purified sterile water to make it drinkable. LITERALLY every government of every nation in the entire world posses the technologies required to give every single citizen of their country access to unlimited clean drinking water. NOT A SINGLE COUNTRY IN THE WORLD HAS DONE THIS, we have had the tech needed to do it since the EARLY 1900s. So yea planet earth is beyond messed up right now.

Maybe invention of money was not a nice idea..

Its more than just money, its the amount of resources per person and the power over X amount of people that follow your rule. Literally until we set up a system like in star trek where EVERY ONE is free to do anything they wish to pursue (so long as it does not harm others) and EVERY ONE has access to all resources; The world is never truly going to get better so long as there is some one in charge with a stock pile of everything and every one has to obey them.

Ah yeah, few people rule the shit out of millions of people.

Even if it was a billion people ruling each other; As long as there are people ruling above others AND People stocking up resources for themselves It will always be messed up. An right now its basically 15,000-50,000 people that rule over 7,400,000,000 people And the 15k-50k have ALL THE RESOURCES ON EARTH at their disposal.

Yeah. We need something like replicator. it's a machine that uses nano machine, turn atoms to another atoms.

We dont even need something that far advanced. We just need to realize; 1) people NEED resources to live. 2) people NEED resources to do/make things. 3) people NEED communication and transportation and trade of themselves and those resources. 4) people NEED a place to live. 5) people NEED a controlled environment in order to survive and live with out being preoccupied with trying to survive. 6) WE ALL NEED TO PROVIDE 1-5 TO EVERY PERSON ON EARTH FOR FREE OR AS CLOSE TO BREAKING EVEN AS WE CAN(free or as close to the GDP created covering the cost of doing so). Right now we HAVE the tech needed to: Create power for next to nothing from renewable energy sources (solar, wind, ocean currents, steam engines[ even nuke plants are just steam engine power systems ], methane, ethanol, methanol) Create transportation (rails, roads, flying, sailing aka any boat on the water) Create instant communication Provide water via ocean purification&distillation Provide food via agriculture and greenhouses Create shelter from virtually any material 70% of the planet surface is uninhabited by permanent structures for living and THATS JUST THE OCEANS (something like 20% of all land mass on earth is how much is covered by cities towns and agriculture) And we have air conditioning, the ability to filter out nearly all contaminants and the ability to build a structure to withstand most natural disasters. SO we ALREADY have EVERYTHING we need to do it. We just wont because; Its not profitable It requires every one to share everything resource wise No one can agree on how to run it let alone who will run it No one knows how to set up the proper service to resource trade to manage it all. An thats it.

Ah...That's really sad truth.