Nopeola. No walls! Nyet. That's because you can spend the shields on units instead. You can use those units to discourage attackers, beat back attacks more effectively, and go on the attack.
Meanwhile, because all civs expand, at least at the beginning, you end up having to build walls in over half the cities to be effective. And in the part of the game where they most matter, walls are much more expensive than units. And you can't use them when you go on offense, which you need to do to win a war. Historically, the biggest walls were failures.
Even for places like Istanbul, I'd rather spend the effort on naval units or armies than walls. You don't need no stinking wall if both sides of it are your lake.
When I stopped building them, back in civ2, my games went much better.
Meanwhile, because all civs expand, at least at the beginning, you end up having to build walls in over half the cities to be effective. And in the part of the game where they most matter, walls are much more expensive than units. And you can't use them when you go on offense, which you need to do to win a war. Historically, the biggest walls were failures.
Even for places like Istanbul, I'd rather spend the effort on naval units or armies than walls. You don't need no stinking wall if both sides of it are your lake.
When I stopped building them, back in civ2, my games went much better.