Karma (what comes around goes around) in Islam:
Let us look at what Allah Almighty said in the Noble Quran:
"Mischief has appeared on land and sea because of (the meed) that the hands of men have earned, that (God) may give them a taste of some of their deeds: in order that they may turn back (from Evil). (The Noble Quran, 30:41)"
"And indeed We will make them taste of the Penalty of this (life) prior to the supreme Penalty, in order that they may (repent and) return. (The Noble Quran, 32:21)"
The idea that life is a "circle", and that what goes around from good and evil doings does eventually come around to the person is all supported in the Noble Quran.
For instance, when a dominant person, who used to deal with people unjustly, loses all of his power by the Will of GOD Almighty, and becomes weaker than everyone else, it would be GOD Almighty's Message to him that he should repent and amend to his GOD Almighty, and make up for those whom he harmed, or else meet the Ultimate destruction.
Some people Allah Almighty would accept their repentance, and some He wouldn't. It all depends on the person, and what kind of evil he did to others.
One thing we must know for certain: There is no reincarnation in Islam!
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