In case you do not know Raoul Wallenberg, he was a remarkable person. He was a Swedish architect and diplomat who saved tens of thousands Jews in the Nazi-occupied Hungary during World War II by issuing them protective passports and providing them with shelter. He was eventually arrested in 1945 by KGB and found dead in Moscow.
Wallenberg was also a cool guy. I was reading a bit about his life and during his stay at the USA studying architecture he wrote a letter to his grandfather appraising his new passion at the time, hitchhiking. He wrote:
when you travel like a hobo, everything is different. You have to be on alert the whole time. You are in close contact with new people every day. Hitchhiking gives you training in diplomacy and tact.
I 'met' Wallenberg in London at the Great Cumberland Place. A monument of him was right across my hotel. He says that we must retain our coolness and humanity. It seemed that someone had shared a drink with him.
