Complex and apparently unpredictable happenings which are highly sensitive to their initial conditions are termed as chaotic systems. Chaotic systems are mathematically deterministic - that is, they follow precise laws but their irregular behaviors appear to be random to a casual observer.
Some chaotic phenomena in the universe are births and deaths of stars, planets, formation of space debris and movement of meteors etc. If we consider our societies, happenings like outbreaks of diseases, growth in populations, heart rhythms, sudden weather changes or even the fluctuations in stock exchange figures may seem to be chaotic. They may not be predictable in the long run, but all have short term predictability.
Now, to an independent observer, our births, lives and deaths are also chaotic. The choices that we make in our lives are based on our thoughts that are molded by an infinite sequence of inheritances of genes from our ancestors and the influence of ever changing surroundings both of which are chaotic phenomena. Also, for any independent system the disorderliness cannot decrease by itself, a thought which is taken from the concept of entropy. Local disorders are fractal images of global ones.

I believe, this world is not unfair but it's a chaos so we shouldn't complain.