We can start with a new paradigm, a new way to view reality and our place in it.
e.g. If we all realized that reality is ultimately of mind. This holistic view of reality is proven time and time again in the practical and theoretical sciences. Computer science know that what makes the computer work is the software, the hardware is just the physical means to carry out the execution of the software.
How can this help us create a new world? The new world is already being created via the digital evolution of humans to trans-humanist. However, a consensus on this topic can accelerate its growth and most importantly ensure moral and social values are implemented with the creation of new technologies.
Its all about the youth brother! Hell yeah. As an American I think we take decent care of our kids in general. I was blown away to see the importance and attention spent on kids in Japan. One major reason for that countries economic status is the time and attention spent on teaching and nuturing the youth.
We (the global community) can learn a great deal from the Japanese. If we (the global community) only did that, the new world would create itself, because the children are the future.