Fascism is not obsolete. It's fucking everywhere right now... Cropping up all over places you wouldn't believe as well, the USA! Not all Fascism wears a red armband and wants to eradicate Jews.

Not obsolete. Utilitarianism is basically "the greatest happiness for the greatests number of people" and "the least amount of unhappiness for the least number of people". It's a very popular concept, definetely not obsolete. Although I guess the original and basic Utilitarianism proposed by Jeremy Bentham and John Stuart Mill has too many problems for any real philosopher to adhere to it today

For example what if the whole world could live in complete happiness forever if but for one single man was to be in constant pain and unhappiness forever. Utilitarianism would say that's okay - but I'm sure most moral human beings would have a problem with that.

I´m agree with you.But if we realy want to implement idea of utilitarianism as
we will live in better world than we live today.