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(CNN) – Pim de Kuijer devoted his life to trying to change the world for the better, working on democratization projects in Sierra Leone, Malaysia, Russia, and Ukraine.
He, along with 297 others, was killed aboard Malaysia Airlines Flight 17 last week.
"He was a person that was very much devoting his life to changing the world," said brother Paul de Kuijer.
There have been a lot of accusations flying as to who is behind the attack that brought down the airliner.
Asked who he blames, Paul said his brother would have wanted everyone to exercise restraint.
"If I want to remember one thing of my brother it's that he believed very much, his conviction was that conflicts like these are not solved by tough words, they are not solved by military intervention, but are solved by dialogue," said Paul.
"The last thing he would have wanted is his death, or even the tragic incident that caused his death, to contribute to even a more difficult situation there in the conflict," said his brother.