English: Log plots of species numbers for both raw species (blue lines) and lineages through time (red line) when diversification is conditioned on survival to the past. In A, the rapid early diversification rate in the blue line is the push of present, and the late increase along the red line is the pull of the present. Shading gives 95% confidence intervals. In B and C, the observed slowdown in rates of diversification through time and relative to diversity are plotted. The parameters for these particular plots are: ${\displaystyle N=10,000}$, ${\displaystyle \lambda =0.5107}$, and ${\displaystyle \mu =0.5}$. From Budd and Mann (2018).