Bandwagon fallacy

Argumentum ad populum is a fallacious argument that concludes that a proposition is true because many or most people believe it: “If many believe so, it is so.”

emphasis on current fads and trends, on the growing support for an idea

The Bandwagon Fallacy is committed whenever one argues for an idea based upon an irrelevant appeal to its popularity. It is logically fallacious because the mere fact that a belief is widely held is not necessarily a guarantee that the belief is correct

The bandwagon fallacy is committed by arguments that appeal to the growing popularity of an idea as a reason for accepting it as true. They take the mere fact that an idea suddenly attracting adherents as a reason for us to join in with the trend and become adherents of the idea ourselves.
This is a fallacy because there are many other features of ideas than truth that can lead to a rapid increase in popularity. Peer pressure, tangible benefits, or even mass stupidity could lead to a false idea being adopted by lots of people. A rise in the popularity of an idea, then, is no guarantee of its truth.

eg Everyone’s doing it.

eg One could claim that smoking is a healthy pastime, since millions of people do it. However, knowing the dangers of smoking, we instead say that smoking is not a healthy pastime despite the fact that millions do it.

eg At a time in history when most people believed the world was flat, one could have claimed the world is flat because most believed it.

eg most runners heel strike, therefore it must be better (it may or may not bet better, but to argue it is better based on popularity is a fallacy)

Pick Your Logical Fallacy:

Ad hominem	Bandwagon fallacy	Cherry Picking	False Analogy	Galileo Gambit
Appeal to Authority Fallacy	Burden of Proof Fallacy	Confirmation Bias	False Balance	Natural Fallacy
Appeal to ignorance	False Equivalence	Slippery Slope Fallacy	False Dilemma or Dichotomy	Non sequitur
Appeal to Novelty Fallacy	Special pleading logical fallacy	Straw Man	Tautology	Post hoc ergo propter hoc
Appeal to Tradition Fallacy	The Moving Goalpost	Wishful Thinking Fallacy	Shill Gambit	Ambiguity Fallacy
Post Hoc Fallacy	Shoehorning	Motivated reasoning	Causal Illusions	Cognitive Biases
It's Just a Theory	Tu quoque fallacy	‘It worked for me’ Fallacy	Argument by Analogy	Sunk Cost
Critical Thinking Skills For Dummies	An Illustrated Book of Bad Arguments	The Critical Thinker's Dictionary: Biases, Fallacies, and Illusions and What You Can Do About Them	Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies	Nonsense: Red Herrings, Straw Men and Sacred Cows: How We Abuse Logic in Our Everyday Language

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