  This paper is an attempt to formalize analytically the question raised in
"World Population Explained: Do Dead People Outnumber Living, Or Vice Versa?"
Huffington Post, \cite{HJ}. We start developing simple deterministic Malthusian
growth models of the problem (with birth and death rates either constant or
time-dependent) before running into both linear birth and death Markov chain
models and age-structured models.
