Universal and individual souls? What does that mean?
In Spirituality (I am not talking from a purely Christian perspective), there is said to be a Universal Spirit which forms the substratum of the world. It is perhaps equal to the Common Consciousness of Jung.
Individual spirits (all of us) are believed to have separated from the Universal Spirit like water evaporates from the ocean. We are now in the process of rejoining the Universal Spirit like rivers flowing back into the ocean.
This belief is the foundation of all spirituality.
The initial separation is called the Fall or the Original Sin. The forces that caused the separation are considered as 'evil' and the forces making us rejoin the Universal spirit are considered as 'good'.
Since every person born in the world is born only because he is separated from the Universal Spirit (otherwise he wouldn't be born here) it is said that every baby is born with the Original Sin.