By changing ourselves, I think
Everyday when we interact with living things, we influence life that surrounds us.
with my words. With the right words we can change the world. Books have started many revolutions and gave many people new ideas and courage.
I can't change the world; I can only impact those around me by being the best person that I can.
It all begins as an idea. Many things have changed the way we live. Changing peoples attitudes towards each other makes a good starting point. Hatred for fellow human beings needs to be addressed and is not easy as many have tried and failed.
BE The Change that You/any one wish to see in the world.
Two things, Spirituality & Knowledge.
I think every problem in this world arise due to some sort of ignorance. If we give right knowledge to the people with a blend of spirituality, that will help them to accept & love the world(people), and make this earth a better place to live.
Spirituality is about the love with god, human and every part of his creation(nature/world). And right knowledge is about the right information that helps people to act in right manner, good for them, others and this world.
To implement that, we may need to inject spirituality & right knowledge in the education systems of this world. This may require decades to centuries to see some +ve results.
By changing my self for the better good
I can't change the world, but I can change people lives!
I can start with projecting a positive additude.
Total war would change everything