human emotion

So I've been thinking that humans have 4 core feelings. I don't usually like to categorize things like this that are kind of out of reach to really comprehend, but I'm convinced people's moods are degrees of:

Anger

Fear

Joy

Sadness

Okay, so I sorted them into those 4, but right after I did that, I noticed something. Joy is alone. Anger, Fear, and Sadness are all usually ugly and negative. So then I thought, wow, we humans are doing all right. If my idea is right, we are doing well just living around each other considering it is in our nature 75% of the time to be upset about something.

Wait, Ryan you can't divide up human emotions like that!  Who the hell do you think you are!! RAHHH plus...who spends 75% of their life without Joy?  Hmm, maybe some do, bummer.  But for the most part, even I don't think that's true, but something should be said for the fact that we are hardwired for only one core, positive emotion.