Contrasting modes of succession planning adopted by leaders

There is a big difference between Great & Iconic Leaders(Level 5 Leaders) and Terrific Leaders(Level 4 Leaders) when it comes to Succession Planning as mentioned by Jim Collins in his book Good to Great..

Whereas Level 5 Leaders set up their successors for EVEN GREATER SUCCESS in the next generation , EGOCENTRIC LEVEL 4 leaders often set up their successors for failure..