Originally Posted by Dr Sloth
So Humanity is this game's morphed version of World/Personal Tendency?
At least that is what I gather so far.
No, it's just a slightly different take on Body/Soul form. Humanity is like the eye stones, only with an extra step and a few extra functions.
Humanity is kept track in the upper left, and like souls it can be lost with death. You can gain them back (along with any lost souls) by finding your blood stain; but like souls you lose it all if you die that second time.
Unlike the Eye stones of DS, you can't directly use it. You can only use it at a fire, like you use souls to upgrade at a fire. There are usable "Humanity" item drops, but they're like the soul drop pickups. A way of storing it in inventory, and never losing it. Basically to use at a fire, right before you unhollow (or in the case of souls, upgrade).
There's two additional interesting things to it. If you die, and you don't reach your stain the second time, you're lost humanity / souls has a chance to turn into a NCP black phantom in someone else's unhallowed world! The second is humanity can be used at the fire to "Kindle" it. No idea what that is yet though.
Personally, I like this system better since the fires work like checkpoints.
Say you were unhollowed (body) and died. Chances are you had a bit of "humanity" built up too. Well if you can make it there in hollowed form, get your humanity back, and find a fire (or backtrack) you can get you unhallowed form back right away. No need to help someone else, invade, or beat a Demon boss.
Least, thats how i understand it so far.