How would I change the world..?
Serious Change:
Get rid of currency and any form of greed. To be able to make things fair for everyone and abollish the need for the "Higher Class."
Everyone should have a similar sized house, how you decorate and build it is up to you. Tools should be shared and respectfully given back a.s.a.p, and all should work to better themselves and their community.
Not taking away competition here, so people can find ways to earn a "bonus" rather than a raise. For example: competitions, prizes = free favour from a tradesman (like make a custom chair.), tradesman with most work that month earns prize.
Maybe make communities smaller, so they can focus on certain areas at a time. In the words of Genesis, "Too many people making too many problems."
Other changes:
Make 'bus stop' like points, and give people individual devices to teleport to those areas. Making traffic excuses a thing of the past.
Have legal, yet controlled Street Fighting competitions. Not pummel someone until they're dead, but submission, K-O or severe injury.
Make more manga lessions available in university/college.
Have Kaoken.