The world we live in is full of heartahces. There are varying reasons to it; from individual achievements, personal griefs, fianncial difficulties and family problems. And within these, favoritism at times is a part of it.
Commonly, favoritism can be found within a family...and this is something that, up to now, makes me wonder why. A mother (or a father) favoring a child amongst her children, a grandparent favoring a grandchild, a parent or a sibling over other siblings. It is inappropriate, it is problem causing and heart wrenching...but it happens.
My own rationalism points to compatibility form person to person. That most often it is the match in personalitites, preferences, perceptions or beliefs. It may not always be the case, I may be making myself believe this giving excuses to other's unfairness. One thing I'm glad of...I am privy to this knowledge and so is sure not to give more favor to a child versus another.