If you are a hemophiliac (a genetic disorder) your blood will not clot. Also certain medicines such as Warfarin or Heparin will act as anticoagulants and prevent blood from clotting. People undergoing chemotherapy for cancer also have problems with blood not clotting due to a reduction in the number of platelets present in the blood.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.