Ever buy one new thing for your home and suddenly feel like everything else needs an upgrade, too? That, my friend, is the Diderot Effect in action. And yes, it’s a real thing!
Named after the 18th-century French philosopher Denis Diderot, this phenomenon describes how a single new purchase can trigger a cycle of acquiring even more things to match or complement that one item. It’s why a new couch often leads to new pillows, a new rug, and maybe even a whole new coffee table—because suddenly, what you had before doesn’t seem to fit anymore.
Why Does The Diderot Effect Happen?
It all comes down to consistency and identity. When we bring in something new, especially something that feels like an upgrade, we subconsciously want everything else to match that same aesthetic or quality level. It’s not just about the stuff—it’s about how we see our space and, in a way, how we see ourselves.
When the Diderot Effect Turns Into Clutter
Now, there’s nothing wrong with refreshing your home! The problem comes when that "one new thing" turns into a shopping spiral, filling your space with extra stuff that you didn’t originally need. Before you know it, instead of feeling excited about your purchase, you feel overwhelmed by clutter, drained by decision fatigue, and maybe even a little regretful about how much you just spent.
How to Avoid the Diderot Effect (Without Killing Your Vibe)
Pause Before You Add More
That new item? Enjoy it for a bit before rushing to "fix" everything else around it. Let yourself sit with the change before assuming you need more.
Ask Yourself: Do I Actually Need This?If you’re feeling the urge to buy more, take a moment to ask: Do I really need this, or am I just trying to match a new aesthetic? If it’s the latter, give yourself some time before making another purchase.
Set a Refresh Budget
If you know you’ll want to add a few new things, set a limit upfront. Maybe it’s just one or two accessories, not a whole room overhaul.
Mix the Old with the New
Instead of replacing everything, find ways to blend your new purchase into your existing space. A mix of old and new can give your home personality without sending you on an endless shopping spree.
Less Stuff, More Intentional Spaces
The Diderot Effect sneaks up on all of us—it’s not your fault! But a little awareness and intentionality can keep your space from becoming overrun with too much stuff. At the end of the day, your home should feel good to you—not like it constantly needs an upgrade.
Have you ever fallen into the Diderot Effect trap? If so, you're not alone.