Something to keep in mind when selecting your heir's new wife based on observations I've made about the various rulers.

Ever noticed how the islamic rulers seem to be better on average than their christian counterparts after a few generations? There's one actual difference. They aren't marrying the progeny of royal losers.

Moral - When you multiply with a zero you always get a zero.

Or - don't marry a princess if her father is a chinless wonder, prefers boys, has an influence of 2 and 0 in all stats.