Today, class, let’s talk about commas in a series. Should you use a comma after the second-to-last element, or not?
Correct: The flag was red, white, and blue.
Correct: The flag was red, white and blue.
Incorrect: Telling people that one way or the other is the only correct way.
I, personally, always use the comma. But it’s purely personal preference. Nothing right or wrong about it (unless your job or college teacher requires adherence to a particular stylebook).
However, exceptions can be made to more clearly communicate information:
Eat, drink and be merry, for tomorrow you die.
On that cheerful, biblical, and hedonistic note–class dismissed.