In most democracy, voting is a right and not a legal duty. Hence, political participation is less than 100%, sometimes a lot less. Some people vote, and vote only in some elections. The number of people who vote is called voter turnout. Voter turnout is the percentage of eligible voters who cast a ballot in an election. In U.S. Presidential elections, for example, turnout is usually between 50 and 60%, with slightly more in the 2008 election which saw many first-time African-American voters vote for Obama.
However, even if voting is not a legal duty in most democracies, it is generally considered to be a moral duty and a civic responsibility. A high voter turnout is generally considered desirable for many different reasons, and most democracies spend a lot of energy on “get the vote out” efforts. One reason for these efforts is the fact that low turnouts lead to unequal representation among various parts of the population. Policies will reflect this and will be to the benefit of those who vote. This can result in discrimination.
High turnout is generally seen as evidence of the legitimacy of the system and low turnout as a symptom of disenchantment, indifference and ultimately of the demise of the system. Of course, a single vote doesn’t make a lot of difference – except in very close races – and hence it’s normal that people feel indifferent. An individual, when faced with a monolithic monster of a state, threatening and distant at the same time, feels insignificant, like a grain of sand on the beach. Powerlessness becomes a fact of life and people retreat from democratic politics. A single voice is not noticed in the noise of millions and is reduced to insignificance. The state does not react to individual claims as quickly as it is supposed to, if it reacts at all. The bottom line is that individuals or small groups cannot hurt the state. Their votes are less than pinpricks. The only elements in society able to influence the centralized state are large, national and centralized pressure groups or political parties that are just as distant from the citizens as the state and equally insensitive to individuals’ claims.
But there is a solution. Federalism and decentralization encourage participation and counteract alienation and a feeling of distance between the citizens and the state.
Apathy and indifference are also the consequence of the impossibility in many democracies to vote for issues. When people are allowed to take decisions on issues, they will be more eager to debate the issues and to inform themselves on the pros and cons of possible solutions. Relying exclusively on representation creates apathy because people can only vote on persons. Take a look here for the reasons why representation creates indifference.
Other ways to promote civic responsibility are better education, a well functioning civil society in which free associations can mobilize citizens, modern information technologies such as the Internet etc.
Greg Mankiw has a different take on the problem of voter turnout:
Voting is a civic responsibility, they tell us, because democracy works best when everyone participates. … But relying on your fellow citizens to make the right choice … can be perfectly rational. If you really don’t know enough to cast an intelligent vote, you should be eager to let your more informed neighbors make the decision.
Eligible voters who are less informed about the candidates than their fellow citizens choose to stay at home, knowing the outcome will be more reliable without their participation. By not voting, they are doing themselves and everyone else a favor. If the ill-informed were all induced to vote, they would merely add random noise to the outcome.
What’s the evidence that this theory is right, that nonvoters are less informed than voters? Studies of voter turnout have found that education is the single best predictor of who votes: The highly educated turn out more often than less educated. A classic argument for why democracies need widespread public education is that education makes people better voters.
Granted. But rather than encouraging the less educated to stay home, as Mankiw seems to do, we should perhaps try to give them a better education.