In this video Paul Andersen explores population dynamics of the human population. The population has show exponential growth since the industrial revolution and all countries will eventually move through the demographic transition. If the growth rate is positive the population will grow exponentially and the doubling time can be calculated using the Rule of 70. The crude birth rate and crude death rate can be used to calculate the natural rate of increase. The demographic transition model and age-structure diagrams can be used to predict future populations.