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It is not a fact. During the war, all human qualities are manifested. Those who skillfully hide their flaws will be exposed. A lot of people are willing to sacrifice themselves for the sake of saving the life of a stranger. I know I was in the war.
Yes, the war will show whether you really have real friends who will help in a difficult situation and what you can do yourself.
Unfortunately, the results are bad. Friends does not happen much. It's not more than 1-2 people. It is very difficult to count on their help. On the war often receive help from strangers people don't even know.
Actually that notion is so overplayed it's nauseating.
There was a great video on youtube of an American soldier in the Iraq 'war'. He had set up his video camera to record his 'assault' on a hill. Of course he was the star of his little movie, a real hero. In the beginning of the Iraq war a lot of hero soldiers would upload their heroic heroism videos to youtube, and people would email youtube asking if there were going to be prosecutions etc, or comment that the soldiers were in fact jackasses not heroes, until finally those videos were banned, probably the army put a sanction on soldiers videos.
Real wars produce real soldiers. Fake wars produce fake soldiers and that leads to a messed up society. At some level most of the soldiers in these fake wars realize that they are being asked not to defend something good, but to pretend something, and so war today is about pretending, not defending. If you are a good enough bullshitter you might become a general.
edit to add
Here is how this monkeyfucking happens
1) Yesterday this article was on Yahoo
https://www.yahoo.com/news/mit-expert-claims-latest-chemical-100819428.htmlWatch the video and read the article, the message is clear to older people.
2) At the time that article appeared, if you google searched "mit expert" and switched to the news tab there were a lot of articles. Then you expanded the related articles there were hundreds of related articles.
3) Today when you expand it there are only 5 articles, all from dubious sources and the Yahoo article is omitted.
This is not something that happens organically from Google trying to provide news.