Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
not least because
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "not least because" is correct and usable in written English.
It is typically used to introduce a reason or explanation that is significant among others, often emphasizing its importance. Example: "She decided to pursue a career in medicine, not least because she wanted to help others in need."
✓ Grammatically correct
News & Media
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
(Not least because, well, gay people have children, too).
News & Media
Not least because later this year the startup will open up its API.
News & Media
Not least because, you know, the money is potentially taken from other groups.
Science
Not least because it isn't actually funny.
News & Media
Not least because he's still alive.
News & Media
Not least because he is absolutely right.
News & Media
Not least because it's a terrible mistake.
News & Media
Not least because I am shattered.
News & Media
Not least because of Vonnegut's style.
News & Media
Not least because it's also a restaurant.
News & Media
Not least because Zaragoza are so dire.
News & Media
Expert writing Tips
Best practice
Use "not least because" to introduce a reason that is particularly important or noteworthy among other contributing factors. This helps to emphasize its significance to the reader.
Common error
While "not least because" is effective for highlighting a key reason, avoid using it excessively in a single piece of writing. Overuse can dilute its impact and make your writing sound repetitive. Consider using synonyms like "especially since" or "primarily due to" for variety.
Source & Trust
93%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "not least because" serves as an adverbial phrase that introduces a clause providing a reason or explanation. It emphasizes that the reason being introduced is particularly significant or noteworthy compared to other possible reasons. According to Ludwig AI, this is grammatically correct and usable in written English.
Frequent in
News & Media
89%
Science
8%
Formal & Business
3%
Less common in
Social Media
0%
Academia
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "not least because" is a versatile phrase used to introduce a particularly important reason among others. Ludwig AI confirms its grammatical correctness and common usage. It is frequently found in news and media contexts, with neutral register, and offers a way to emphasize the significance of a specific factor. When writing, use it to highlight key reasons, but avoid overuse and consider synonyms for variety.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
especially since
Emphasizes the reason's importance with a direct causal link.
particularly as
Highlights a specific reason as noteworthy.
mainly because
Indicates the principal reason for something.
primarily due to
Stresses the causal relationship with a formal tone.
largely as a result of
Highlights the impact of a specific cause.
significantly because
Emphasizes the considerable impact of the reason.
notably because
Draws attention to a particular reason.
in particular because
Singles out a specific reason from others.
above all because
Indicates that the reason is the most important.
mostly because
Signifies that the reason is the predominant one.
FAQs
How to use "not least because" in a sentence?
Use "not least because" to introduce a particularly important reason among several others. For example, "The project was successful, "not least because" of the team's dedication."
What can I say instead of "not least because"?
You can use alternatives like "especially since", "primarily due to", or "mainly because" depending on the context.
Which is correct, "not least because" or "no less because"?
"Not least because" is the idiomatic and widely accepted phrase to introduce a significant reason. "No less because" is less common and may sound awkward to native English speakers.
What's the difference between "not least because" and "because"?
"Because" introduces a general reason. "Not least because" emphasizes that the reason you're introducing is particularly important or noteworthy among other potential reasons.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
93%
Authority and reliability
4.5/5
Expert rating
Real-world application tested