Voting is a duty of common pursuit. There is nothing more rational than acting individually to achieve collective benefits
… one individual decision not to vote – combined with similar decisions by others – can keep unjust governments in power or just ones from being formed. There is nothing irrational about wanting to avoid these possibilities by acting in conjunction with others in the same way that we cooperate with others by recycling or donating to charity. Even if I have no way of knowing if others will vote, I should act as if they would vote, and they should act similarly. This is the logic of collective commitment that undergirds the morality of voting.
This approach to collective rationality should reduce the allure of free-riding – ie, the predisposition to gain from the effort of others without doing our fair share of the work needed to generate a collective benefit.
— Read on aeon.co/ideas/given-how-little-effect-you-can-have-is-it-rational-to-vote