[MaxWilson]

The way I see it, capital PD is just free meat-shields to combine with your researchers. It's not supposed to be extremely tough (it's only worth about 250 gold), but it's useful for the librarians. I think I'm opposed to the idea of giving an initial 50 PD at capitals, in the base game. PD by itself should not be capable of fending off very many attacks. If you wanted to houserule that weaker nations have some immobile defenders for their capital, though, that could be kind of cool. It wouldn't stop enemies from stomping all over their empire, but it would make decapitating strikes less possible.

-Max