* Clarity: "First" is more direct and unambiguous. It clearly signals the beginning of a sequence or list.
* Formal Tone: "First" is considered more formal and academic than "Firstly," which can sound a bit informal.
* Conciseness: "First" is shorter and more concise than "Firstly," making your writing more streamlined.
When to Use "Firstly":
While "first" is generally preferred, there are some instances where "Firstly" might be acceptable:
* Emphasis: If you want to place particular emphasis on the first point, "Firstly" might be used for dramatic effect.
* Consistency: If you've already used "Secondly," "Thirdly," etc., then using "Firstly" for consistency can make your writing flow better.
Example:
* "First," we need to establish a clear definition of the term.
* "Firstly," we must consider the historical context.
* "Secondly," we need to analyze the economic implications.
In conclusion, stick with "First" unless you have a specific reason to use "Firstly."