The fertility rate is far more important than mortality. You can calculate for yourself that even if humans were immortal, an average fertility below 1 child per parent does not lead to exponential population growth, while average fertility above 1 child per parent means exponential growth even if people keep dying at seventy.
The fertility rate is far more important than mortality. You can calculate for yourself that even if humans were immortal, an average fertility below 1 child per parent does not lead to exponential population growth, while average fertility above 1 child per parent means exponential growth even if people keep dying at seventy.