Food for thought - schadenfreude
Schadenfreude is a common english word borrowed from German, it means enjoyment obtained from the troubles of others. While at the superficial sense it seems terribly immoral, most of us, if honest enough, would remember occasions in which we practiced schadenfreude. According to classical evolution theory, we should feel happy if our rival took a fall; however, a newer generation of evolution scientist actually found some compelling reasons for teamwork, rather than the old fashioned adage of "every man for himself".
I for one, would commit myself to be as un-schadenfreude as possible.