Modes of Birth and Death.

"Again,again the slow wits seek rebirth,
Again,again comes birth and dying comes,
Again,again men bear us to the grave."
(Samyutta Nikaya)

The formula of paticcasamuppada describes the process of rebirth in subtle terms and assigns death to one of the following four causes.

1.Exhaustion of the reproductive kammic energy (kammakkhaya)
The Buddhist belief is that,as a rule,the thought,volition,or desire which iscextremely strong during the lifetime become predominant at the time of death and conditions the subsequent birth.In this last thought-process is present a special potentiality .when the potential energy of this reproductive kamma is exhausted ,the organic activites of the material form in which is embodied the life force cease before the end of the life-span in that particular place.This often happens in the case of beings who are born in states.