The Principle of Least Interest for Writers quote

The Principle of Least Interest

The Principle of Least Interest for Writers quote

The Principle of Least Interest is one of those areas in which science has confirmed what common sense has long maintained: the person who cares the least has the most power. This principle works everywhere from the housing market to the marriage market. If the buyer is more eager to buy than the seller is to sell, the seller will determine the selling price. If he loves her more than she loves him, he could end up the proverbial hen-pecked husband of so many comedies; vice versa and she is a candidate for the downtrodden foot-wipe—perhaps abused—wife of so many tragedies. This principle is so well understood that sometimes people try to disguise their true levels of caring/interest (talk of other great offers forthcoming, flirting with or dating a rival). Inherent in disguise is the understanding that what counts is often the perception of least interest.

The first take-away for writers:

For your characters, know who has the power and who is perceived to have it. And if your work has more than two characters, you need to understand the power relationships for each pair.

Unlike a credit score, people can’t go on-line and check out their power ratings.The primary reason that power relationships are often unclear is that the bases of power are virtually limitless: expertise, physical attractiveness, intelligence, wealth, athletic ability, knowledge of secrets, ability to make the other’s life miserable, being popular, great sense of humor—anything and everything that is important to that pair. Knowing the facts doesn’t tell you/the reader who has the power. If she married him for the money and he married her for the Green Card, who cares more? What if we add in that she is beautiful and he’s a great problem-solver; she’s moody and he’s uncommunicative; he’s a natural athlete and she manages their money; they’re both extremely intelligent and care mightily for their two children. As the author, you can determine who has the power by giving weight to these factors based on the characters’ perceptions of what is important.

The second take-away:

Power is seldom one-dimensional, and if you don’t recognize the complexity, your characters will be flat and unrealistic.

In many relationships—for example, boss/employee, parent/child, older sibling/younger sibling, teacher/student—the general expectation would be that the total power package would favor the former. But my guess is that most readers don’t read to confirm the norm; they like to be surprised.

The third take-away:

You should at least consider writing against common power expectations.

And just to end on a high-brow note: according to Lord Acton, “Power corrupts. And absolute power corrupts absolutely.” Consider how less-than-absolute power might corrupt your character(s).


  • Know who has the power and who is perceived to have it
  • Power is seldom one-dimensional, and if you don’t recognize the complexity, your characters will be flat and unrealistic
  • You should at least consider writing against common power expectations

 Learn more

“Who Has the Upper Hand? Power, Sex, and Seinfeld” by Dr. Benjamin Le

The Personal Use of Social Psychology by Michael J. Lovaglia (2007)

Social Psychology and Human Sexuality: Essential Readings by Roy F. Baumeister (2001)

Why Women Have Sex: Character Motivation Matters

I recently read an ad for a book titled WHY WOMEN HAVE SEX: Sexual Motivation From Adventure to Revenge—and Everything in Between, by Cindy Meston & David Buss, a clinical psychologist and an evolutionary psychologist, respectively. According to the ad, the authors used material from more than a thousand interviews with women plus research on physiological response and evolutionary emotions to explore sexual motivation. They mention sex as a defensive tactic against a mate’s infidelity (protection), as a ploy to boost self-confidence (status), as a barter for gifts or household chores (resource acquisition), or as a cure for a migraine headache (medication). No doubt any of us could come up with additional motives not mentioned in the ad!

Not having so much as seen the book, I can’t comment on it. But the ad alone is a titillating way to underline the following takeaway for writers (and readers):

  • Behavior (in this example, sexual behavior) is what happens.
  • Motivation is why it happens.

How readers feel about a behavior—and the character who did it—depends largely on what they think the why is. Think killing. Think stealing. Think paying a compliment. Think a million dollar gift to charity. There needs to be enough on the page to meet the writer’s goal of being clear or ambiguous about a character’s character! By and large, leaving motive wide open shouldn’t be a conscious choice for a writer. It leaves the reader with one that-was-out-of-left-field response after another. When ambiguity is the desired outcome, make the reader consider again and again the two or perhaps three motives that might cause the character to do A, B, C, D, etc.  In general, this is a good way to reveal character—through behavior, not narrative. Much better to show Miriam going to bars, hitting on lonely or vulnerable men, and otherwise acting as a sexual predator than to simply announce that to the reader.

Read more on character motivation

“Rational and Irrational Behavior in Your Characters” 

“Writing Tip: The Five Ws”

Story starter on motivation

“Permanent Make-Up”