Orthodoxy versus heresy

From Marvin Meyer’s The Gnostic Discoveries:

But what are orthodoxy and heresy? What is the source of the authority of the “orthodox” texts in the canon of scripture? From an historical point of view, orthodoxy and heresy may be understood as rhetorical constructs, as Karen King states, fashioned in the arena of political debate. Understood in this light, orthodoxy and heresy have little to do with truth and falsehood and everything to do with power and position. In a vote, the majority defines what is orthodox, and the minority is charged with being heretical. Among competing political factions, the dominant force dictates what is orthodox; those less powerful are designated as heretical. And the winners define the Bible.