There is not much we have to do, simply change our energy sources, societal norms, and leadership structure of the world. Three simple steps to improve the entirety of humanity.
Energy
Our energy consumption levels are dramatically too high, and they are only projected to be increased in the next decade. There is no need for somethings like street lights being on consistently, or the use of old bulbs that are inefficient. There are plenty of technologies now that are viable replacements for many current standards. Such as LED lighting, biking or walking to places instead of driving, having a strong city wide public transportation system, etc.
Not only that but solar panel technology has gotten significantly cheaper, new innovations in wind turbines, innovative hydro dynamic engines, and much more can be used to replace many energy sources we have now. All it takes is for the society to change the mindset of where we get our energy, and the slight cost of upgrading. People say "why should I change when it is free not to?", well it won't be free to our ecosystem. The damage we have made is already unreasonable, yet we choose to ignore the natural call signs of global warming.
There is great potential in these highly versatile technologies, and no negative impact on the Earth. Why we haven't already fully integrating them is astonishing.
Society
Our common people mindset is highly sheepish, and just go with the flow of the group. We have limitless knowledge in our pockets, in our homes, and at work. Still people find themselves stuck in rudimentary tasks, primitive mindsets, and lacking in common sense.
There is a saying by the U.L.C. "Philosophy is only common sense you haven't learned yet.", and this holds true for the wise people across the world.
REACH OUT AND #MAKEACHANGE, in your life, in your neighbors life, and in the lives of the people in your city. If we all start to make a difference it will cascade throughout the country then world. We have the potential as a society to get some amazing things accomplished. If you look at what we started to do when the internet was being the innovation hub, and during the Space Race, there is massive potential in the common people. Just need to activate their drive to get things accomplished!
Unity
Unification is necessary for habitual growth of the world. We need strong leaders who can instill compassion and unity. The leaders of the world are necessary to get things done, but they need to be people who are worth following. Not appointed to the position by pure societal votes, but by people who have thoroughly researched the representative. Creating a much stronger outcome, as the people deciding know all there is to know about the person. This should grow into a society standard, that in order to vote, there needs to be some sort of test of knowledge on the candidates.
Once this is accomplished our leaders of the world will stand out in quality, as we know they can meet our needs. Not only that our leaders should be from all walks of life, not just debate, but from science, agriculture, and others. Then trained on how to be a politician with the chance to follow their own course. This way there is no confining to a norm, but just a chance for them to learn how to lead, to better suit the people.
This will lead to a stronger and more unified response to the elections, and more a decisive system that allows for greater progress.
These are fine and dandy, but if we don't act on them nothing will change. You reading this, yes you, please start to do something. It does not matter if it is just buying a solar panel to charge your phone, or going out and changing your home to be purely solar powered during the day. The impact that you are making just by starting will ripple down. We can really change the world by changing the way we act. If we change how we act as a person, then keep that flowing into every person around us. It will dramatically improve our lives, then open us to new endeavors in the future.
Change the person, change the energy source, change the society, then we have a massively new unified world.