The biggest cause of cardiovascular disease is a build up of plaque in the arteries. This can lead to a blood clot further more a heart attack or stroke. It is an inherited trait so it can be passed down from family.
Also high blood pressure, high cholesterol and obesity are other causes.
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.