If you've read the book (I Am Legend), you'll see that those weren't zombies. They were the evolution of the human race.
Yup, human sexuality. Zombies are a representation of human sexuality and how it consumes society. Just a few key points...
- Zombies lust after human flesh. This is pretty obvious symbolism for sexual desire.
- Zombies are very slow moving, sloth-like creatures. Even though they are very slow and dim-witted, they continuously move forward until they get what they desire. This is another example of symbolism for sexual desire and the "hunt" for a sexual partner.
- Zombies don't even really know "why" they lust after human flesh. They are programmed to just do it, even though they don't understand anything. This is supposed to represent the human desire to mate. We don't really know "why" we want to have sex...we just do.
- (MY FAVORITE) Once you are wounded and/or bitten by a zombie, you will become a zombie yourself. The zombies DNA will enter your bloodstream and slowly, but surely, turn you into a lusting shell of a person. This symoblizes a human losing their virginity. Once you have a taste of the flesh (aka - SEX), you will want it again and again and again. Your body, once it has had a taste of lust, will forever beg you for more. It consumes every aspect of your life and you don't even realize it. The lust for flesh (sex) is always on your mind and controlling everything you do, even though it is completely in your subconscience.
I would recommend finding a book about it, because the symbolism is actually pretty cool. At least, IMO, it is. :dunno: