brother can you spare some change?

My sister asked me to write and essay about how I think we can or should change the world. This is a topic I've had several discussions with people about, and it's important. Change is occurring, every moment. The state of change could arguably be the only permanent feature in reality as we know it. Some things may not appear to change, but that's just a matter of perspective.
The idea that people have that things are a certain fixed way is perhaps the greatest barrier to happiness and satisfaction in life. We come to believe that a certain thing is a certain way and when we look to it, and it is not, then we feel tension or anxiety because we have to rework the formula of our interactions.
In the world at large, lots of issues exist, big issues about food, water, generally environmental security all around. This is a result of course of mankind's fascination with combustion powered machinery. But even predating that, security in one's environment has seemingly been a constant for fearful men (please allow the masculine term to represent the general).
Issues about the treatment of other living beings are also very present. From global war to slave labor and uneven access to health and all other services. But none of these are new issues either.
If I was to recommend to a person how they could act to change the world, it would be to stop looking out to the world and it's issues and how to effect them. Start first with the interior life, change how you view yourself and others, how you react to the environment and how you engage socially with your fellows.
One cannot directly through means of force create anything. The laws of thermodynamics show that energy and matter cannot be created or destroyed. But changed. We can change. As individuals; by living patiently, with kindness, and humility, and perseverance. By being a positive field of energy, we can positively influence the world around us to feel and be more positive as well. If enough people were to persist in this sort of activity. Because altering the interior life is an active process, even if it doesn't outwardly appear so. If enough people engaged themselves so, the world itself would rapidly change.
So brother, spare me some change, take the time to take time, think out the effects of the change that you are constantly making in the world, and change it for the better.