Here's why:
* General rule: We capitalize proper nouns (specific names of people, places, things, etc.). "History" as a subject of study is a general term, not a specific name.
* Consistency: Most colleges and universities use lowercase for subjects of study: "English," "mathematics," "biology," etc.
Example:
* "I am majoring in history."
* "The history department is located in the main building."
However, if you are referring to a specific history department or program, you would capitalize it:
* "I am a student in the Department of History at [University Name]."
* "The History Honors Program at [University Name] is very competitive."