Samir's treatment of his brother in Slumdog Millionare?

I just saw that movie..Wasn't it awesome??!!.That has to be one of the best movies I have seen in a long time..OK....I don't have any siblings, but, I would think their behavior would depend upon the influence of parents and the culture...I think Samir acted with the "survival of the fittest" instinct. The brothers were so poor that Samirs behavior was the reason that the boys survived childhood. Money meant nothing to Jamal. Remember when he gave the 100$ to his blind friend? Samir finally saw the real meaning of money. The money he had earned was "blood money" He did the ultimate act of love. He died for his brother and made sure that the ones that killed him would see his blood on the money and know why he died..Such a beautiful, yet, cruel movie..I loved the ending..yes..I cried like a baby...:)