The tipping point

I don't know why I'm still here, cos the night isn't that young anymore and so ain't I, but my mind is bright after an entire day of dizziness and nausea.

We are all taught by our well meaning parents since we were wee toddlers, the difference between right and wrong, evil and good.
Stealing is wrong. Giving is good. Beating people up is wrong. Unless its in self defence. (Though of course some would differ on this)
In many cases, the line between right and wrong is faint and blurred, leaving people befuddled in no man's land.

Since ancient times, punishment has been used as the "stick" to preventing immoral human beings from committing the most sacrigalous of crimes. (The Chinese have a very useful tool called the "teng tiao", of which I'm sure many of my naughty friends out here have fallen victim to)
We could therefore safely assume that state punishment is the biggest stick of all, and thus the government is sends the ultimate signal of what is right and wrong in the country.

For democratic countries, the governments are elected by the majority vote.
Hence, the laws of the country , the signal that shows what is right and wrong is chosen by the majority of the people in the country.

(The following example is purely hypotheical and has no political suggestions. Any resemblence to persons dead or alive is purely coincidental )

This country is made up of people A and people B, with A being the 99% majority.
What if the majority of the country are of people A and they elect a government that is bent on anihilating race B?

Would this make the anihilation of B right, since it was a decision by the majority?
What if this decision makes the majority -people A happy since there have been inter racial tensions brewing between the countries for eons?


Perhaps happines of the majority is the tipping point between right and wrong.

Assuming that most humans are selfish, they will make decisions based on how happy they will be.
Hence, if the majority of the people are happy with the decision, the decision will be made.

Is this the "right" way to draw the line between good and evil?