"Approval voting, the simplest of the alternative methods, dates back to at least the 13th century, when Venetians used it to help elect their magistrates. It was subsequently reinvented many times, although it didn't acquire a name until 1976. In an approval vote, a person casts one vote for every candidate he or she considers qualified for the office. It's like an opinion poll, only the results are added up to determine a winner ..."
"Voters are more equal if they have an equal opportunity to express themselves," he [Donald Saari] argues. If I prefer one candidate above everyone else, I can better express myself with a bullet vote for him. Another voter who hates one candidate can express his preferences by voting for the other four."