Here are some reasons why certain words are capitalized:
* Proper nouns: These refer to specific people, places, or things. For example, "Congress," "President," "United States," and "Senate" are capitalized because they are unique entities.
* Titles of government positions: Words like "President," "Vice President," "Secretary of State," etc., are capitalized because they refer to specific positions within the government.
* Formal documents: It was common practice in the 18th century to capitalize more words in formal documents than we do today.
The word "welfare" is a common noun and does not refer to a specific person, place, or thing. It is not capitalized in the Constitution because it does not meet the criteria for capitalization.
It's important to note that capitalization rules have evolved over time. While the Constitution is a historical document, the way we capitalize words today is slightly different.