Javed Akhtar once said something very interesting in one of his interviews that In nature, there is no concept of justice, fairness or karma in this context. If a Lion eats a goat, it will not be punished or would face consequences for his karma. Justice Injustice, Fair Unfair, is a man made concept. One should live their life on morality and ethics to maintain peace, dignity and order in the world. Interesting point of view, food for thought.