There is nothing so eternally adhesive as the memory of power. - Isaac Asimov

On Earth, we have a continuous influx of young people who are willing to change because they haven't had time to grow hard set in their ways. I suppose there's some optimum. A life long enough for real accomplishment and short enough to make way for youth at a rate that's not too slow.

It is enough for a Psychohistorian, as such, to know his Biostatistics and his Neurochemical Electromathematics. Some know nothing else and are fit only to be statistical technicians. But a Speaker must be able to discuss the Plan without mathematics.

It is always useful, you see, to subject the past life of reform politicians to rather inquisitive research.