Action-Reaction

As per natural law the action(cause) and reaction(effect) form a continuum. They can never be separated in time.

There cannot be any gap between happening of cause and its effect.

Then how is it possible that our past karmas affect our present birth?

Somehow I think the misunderstanding of the Kerma Theory ( the concept of "action and reaction or cause and effect" ) has happened total , otherwise the world would have been a beautiful place from the point of view of ignorants.