"You're confusing your own impression and opinion what was an scocial necessity in ancient times."
That was not always the case, but mostly it was. Some countries are still that way today as well. So to say in ancient times is kind of misleading on it's own, because it still happens. It's a common tactic in America for a fereigner to get married to a citizen here to gain citizenship. My girlfriends mother did that, and then she divorced him and married her real lover and gave him citizenship. I had a teacher who had an arranged marraige in India, and they're still married after 13 years.
"Homosexuality was not an option, a homosexual person would be still married and would get children because it was his necessity."
There wouldn't be stuff against homosexuals if there weren't any around. But if you're saying that it couldn't be a lifestyle then yeah your right.
" An unmarried woman has no social disadvantages for being unmarried, a marriage is done because of affection not out of necessity. Thus also when this affection is disturbed or completely destroyed a couple will not endure this awkard situation like it was done in past millenias but just decide they'll go seperate ways."
While this is very true, single mothers are on the rise in the working industry, you have to watch divorce court as well. We've got a couple stations with their own version of divorces, why they want a divorce etc. etc.
"I won't even start how varied the definition of murder can be. When we look at certain ancient societies murder however was not equal to kill someone."
Erk...then what was it equal to? I'm curious now lol
"I don't have the experience that cheating is a social norm or even tolerated."
Oh I do! I do! I'm born from adultery! I keep secrets for my cousins when they cheat on their girls, their father cheats on his wife whenever he's out of the country. My other uncle has 3 girlfriends and still goes to whorehouses, he recently divorced his wife after she found out he had a total of 6 kids between those 3 girlfriends, and they all know.