Right & Wrong

I never understood how people can find whether something is right or wrong. I have many examples which can prove that right and wrong depends on the person and their views, either this or choosing what a large amount of people are choosing just to not be the odd one out. Example 1 : If you are a soldier in a war, you are fighting thinking you are protecting your family and other families. That's another point that you are also protecting people like Epstein and serial killers by fighting another country while the other party is also doing the same. Who is wrong here? The one who is protecting their family or you? Then if you think as a common person, they think they are doing the right thing because of this or that reason on the internet, while the other party thinks in their favour. Soo who is wrong again? Example 2 : If your daughter is dying and she has 1 month to live, who is 18, and there is no cure that can fix her, while she says that she loves an 80 year old man with good…