“What if everybody did that?” is both the title of a popular kids’ book and a bigger moral idea about how small actions add up when everyone does them.

What the phrase means

At its core, “what if everybody did that?” is a way of asking:

  • If this little thing is okay for me, would it still be okay if everyone behaved the same way?
  • Would the world stay roughly the same, or would it become messy, unfair, or unsafe?

It pushes you to judge an action not just by “Is it a big deal when I do it once?” but by “What happens when this becomes normal for everyone?”

The children’s book angle

Ellen Javernick’s picture book What If Everybody Did That? makes this idea really concrete for kids.

  • A child does one “small” bad thing (throwing a soda can out the car window, splashing too much in the pool, talking during story time) and then sees what the world would look like if everyone did the same.
  • The scenes escalate into chaos: litter everywhere, no one listening, rules constantly broken.
  • At the end, the book flips it: what if everybody did small kind things (like giving hugs, following rules, helping out) and how much better that would make the world.

Teachers often use the book at the start of the school year to talk about classroom rules, respect, and responsibility.

The moral / philosophy idea

In ethics, the same question shows up in more “grown‑up” ways.

  • It’s similar to the idea in Kantian ethics: ask what would happen if your action became a general rule everyone followed.
  • Example: “It’s just one piece of trash” becomes “The ground would be littered if everyone thought that way.”
  • By scaling your behavior up to “everyone,” you see whether it could be part of a fair, livable society or whether it would destroy trust, safety, or basic order.

Writers and educators use this question to help people pause before they act, especially when they’re tempted to do something because “it’s just me” or “other people do worse.”

Why it still feels relevant now

In 2025–2026, the idea behind “what if everybody did that?” shows up a lot in conversations about:

  • Online behavior: trolling, spreading rumors, sharing unverified “latest news,” or doxxing—if everyone takes part, platforms become unusable and hostile.
  • Public spaces: mask‑wearing during outbreaks, picking up after yourself in shared areas, basic politeness in crowded cities or transit.
  • Climate and consumption: “my flight / my plastic bottle / my long shower doesn’t matter” breaks down once you imagine billions of people making the same choice.

The phrase becomes a quick mental check: is this harmless because it’s rare, or would it be a disaster if it became normal?

Different ways people see it

You’ll see a few viewpoints in forums and essays:

  • Pro: It’s a simple, powerful way to teach responsibility and the idea that your actions affect others.
  • Pro (for kids): The concrete “what if everyone did this?” images stick with children and help them see beyond their own moment.
  • Con / caution: Some argue it can be misused to shut down harmless individuality or to guilt people even when their action wouldn’t realistically scale that way.
  • Balanced take: It’s a great starting question, as long as you also think about context, actual consequences, and whether the imagined scenario is realistic.

A simple example:

  • Coloring your hair blue: if everybody did that, the world is just more colorful—no real harm.
  • Texting while driving: if everybody did that, crashes skyrocket—clear harm.

One fails the “what if everybody did that?” test; the other passes. TL;DR: “What if everybody did that?” is a short way of asking you to think beyond “just this once” and imagine the ripple effect of your choices—whether they would make the world better or turn it into a mess if everyone copied you.

Information gathered from public forums or data available on the internet and portrayed here.