So, is the protagonist of The Crucible a knight or a subordinate being with no backbone? Is he a person who has overcome obstacles and still looked generally good in the process, or is he just a nameless indentured servant to Abigail and her coterie of cronies? This post seeks to concisely answer the question, cutting back on precious time and superfluous words.
First, we must define: what is a hero? A hero is someone "identified with good qualities," is usually amicable enough, and has a decent track record. John Proctor fits the bill. The town, with mostly the exception of Rev. Parris, respect and perhaps even like him. He is a Christian, God-fearing man who other than plowing on Sunday has only committed one true crime, both legal and moral: adultery. He succumbed to his temptations, with Abigail Williams egging him on. Only once did he actually commit lechery with her, but that was enough to tarnish his relationship with Elizabeth and foster hope in Abigail of deja vu-an encore of what happened between them. He is indeed a hero, but he is a tragic one. He actually had two flaws, really: temptation influenced his dealings with Abigail, and in the end of the play, hubris (a Greek word meaning pride) keeps him from signing his confession that he is a witch, and leads him to his own hanging.
His brief relationship with Abigail should not be underestimated. Too many times in history, and especially today, you see people succumb to temptation and hurt their spouses forever, have children out of wedlock, step across ethical lines, and/or transfer AIDs and other sexual diseases. Even if he didn't impregnate Abigail, the situation between John and Elizabeth had never been the same again when she heard of the harlot's crime. Of course, there is also the breaching of ethical lines that must be taken into account as well. Therefore, John Proctor is not the fantastical role model so many people dream of. But then again, no one is.
I'll finish off with a final word: as a young child, I always loved to divulge The Series of Unfortunate Events, written by Lemony Snicket (otherwise and usually known as Daniel Handler). In one of the latter books of the series, he brings up a few good points: that people are like onions (meaning their intentions may be murky and they are ridiculously complicated) and that humans are "a chef's salad," meaning they are composed of both good and bad things. People are like onions, with many layered ideas, intentions, and pasts that are difficult for even the most adroit scholar to decipher. Humans are also chef's salads, for even though they may have not ever committed a crime, life is a series of interlocking fates, with people simultaneously helped and hampered by others. Such is the nature of life.