What would prevent the world government from becoming tyrannical and oppressive?

The same things that prevent most democratically-elected governments from becoming oppressive, but much better designed. We are well aware of the phrase “Power corrupts. Absolute power corrupts absolutely,” and have seen this in the rulers of a number of countries.

First, a world federation would not have absolute power. It would have only power to address issues that cannot be addressed at a more local level. Furthermore, a world federation would have to possess unshakable checks and balances.

Not only would powers be distributed among legislative, executive, and judicial branches, but the world government must include a system of independent auditors, inspectors-general, and ombudsmen. This would avoid the concentration of authority, and allow for the maximum amount of transparency, more so than any government institution ever has. Nothing else will be acceptable.

We expect the finest minds of the world to work together to create a system that ensures the continual prosperity for ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.