If you think of an election as a game, it is a rather fascinating game. Let us pretend that you are a player participating in a game called Elections. As a player, what is the most rational decision you can make?
The obvious answer is to not vote on the day of the election and do something else instead. As elections tend to be decided by a significant difference in the number of votes between parties, the probability that your single vote will make a difference is near 0. Ergo, instead of wasting your time submitting a vote that will have virtually no effect on the results, you are better off doing something more productive.
However, despite this, there are fools who vote in every election. The fools’ votes pile up and make the world keep on moving forward.