Bluezy13:
Karma is not a principle.
Karma is a doctrine of principles.
The principle of Cause and Effect or Sowing and Reaping or Action and Reaction is one of the principles of the doctrine of Karma.
Karma is an embodiment of various principles of which the limitation of Karma to denote Action and Reaction only, will tantamount to falsification of the religious doctrine of Karma.
Karma is the doctrine of a religion... hinduism etc. ... Only that one of its principles which is the principle of Cause and Effect, is practical and somewhat realistic in some circumstances.
It is erroneous that when Karma is mentioned, the ideality of cause and effect, of Action and Reaction and the likes, come to mind as if that...and only that...is Karma.
Permit me to opine that I find it highly erroneous and half-baked whenever I come across christianity religious practitioners and the likes incessantly making reference to the pagan word "Karma" as if it is part of christianity oblivious of its implication and representation.

Now to the poster; in the stead of using the word Karma as your subject of emphasis, I would rather that you directly say that "The principle of Sowing and Reaping or the principle of Cause and Effect (which ever you choose) does not exist." Only then would your argument be without falsification of the premise.
Now if I should go with the premise that the principle of Cause and Effect does not exist, I would argue that it exists but not in all ramification.

Note: Any reader that finds my post nonsensical should first conduct a personal research with respect to my point before concluding on its "nonsensicality"...if at all there is any word like that.
And if any reader finds my post somewhat confusing, it would suffice for such a reader to read it over and over and over and...until the reader finds clarity; otherwise the reader should respectfully ignore.

TMTR:
The earlier y'all realize this fact , the better for you, look there's nothing like karma , it's just a bullshit theory created to keep y'all in check just like organized religion...

Jman06:
You're obviously a small boy who hasn't seen anything in life.

Karma is real. Every action you take in this life has its rewards. In many cases, the reward even manifest directly and immediately while the person is still alive. In other cases, the individual's unborn generations suffer the consequences or reap the benefits of their actions.

In my village for instance, we used to have some native doctors and warriors who delighted in human sacrifices. Some of them would request for virgin girls when they go for consultations in other villages and towns, and when they were given such virgins they murder them in cold blood upon return from such journeys.

Today, go to families of such men and you'll see that no one is making headways there. It's from one calamity to another. In fact, many of such families no longer have living souls surviving there! This is not one, two or three families I'm talking about. I'm talking about many of them that I know, not hearsay!

Fmlao:
How can u say KARMARUdeen doesn't exist?

Readability:
Very true, especially growing up in Nigeria and, seeing the way the leaders has been ruling us over the years. Nothing jaw dropping has ever happened to them, or their family and, you expect me to believe karma exist. Just like organized religion, karma is only for the poor and the ignorant.