Antichrists

Who is the antichrist, or antichrists, that John is talking about?  It's not one specific person, or group of people, per se, but rather, as Clarke's commentary suggests: "Every man who opposes the spirit of the Gospel, and every teacher and writer who endeavors to lower the Gospel standard to the spirit and taste of the world, is a genuine antichrist, no matter where or among whom he is found."  As long as we stick to the word of God, we will be able to discern the antichrists of our day.