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The American Yawp, Volume 1, edited by Joseph Locke and Ben Wright, licensed under CC BY-SA 4.0. Read the original free This shelf’s study material is shared under the same license (CC BY-SA 4.0).
Chapter 16 · pp. 528–534
Historians build arguments about the American past from evidence, and not all evidence is the same kind. This section explains one of the most basic distinctions in the field: primary sources versus secondary sources. Knowing which kind you are reading helps you decide how much to trust it, what it can tell you, and what questions to ask next.
A primary source is material created during the time being studied. It comes from people who lived through the events or from the period itself. Common examples include:
For example, a letter a soldier wrote to his family in 1863 describing camp food, boredom, and fear is a primary source for the Civil War. It shows what one person saw and felt at the time, in his own words.
Primary sources are valuable because they are close to the events. But close does not mean complete or neutral. The soldier knew only what happened in his own regiment. He might exaggerate to impress his father, or leave out bad news so his mother would not worry. A good historian reads a primary source asking who made it, why, and for whom.
A secondary source is a later account that interprets events. The author usually was not there and is working from evidence, often primary sources. Examples include a history textbook, a scholarly article, a biography, and a documentary film.
Suppose a historian today reads hundreds of Civil War soldiers' letters and writes an article arguing about why many soldiers kept fighting despite harsh conditions. That article is a secondary source. It does not simply report what happened. It sorts evidence, finds patterns, and makes a claim.
Secondary sources are useful because they bring many pieces of evidence together and can see long-term results that people at the time could not. Their weakness is that they carry the author's choices and viewpoint. A historian decides which evidence to use and what it means. Older secondary sources may also reflect ideas that later research has corrected.
The difference comes down to two things: distance and interpretation.
Imagine you want to know how soldiers felt about army life. The soldier's letter gives you one firsthand voice. The article gives you a broader picture drawn from many voices. Neither is enough alone. The letter might be unusual, and the article might be wrong about what a particular letter meant. Using both lets you check one against the other.
Ask these questions about any source:
Some sources fall in a gray area. A memoir written thirty years after a war is by a participant, so it is often treated as a primary source. But memory fades and changes, and the author has had years to rethink the events, so it contains some interpretation too. Also, the same item can be primary or secondary depending on your question. A 1950 textbook about the Civil War is a secondary source on the war. But if you are studying how schools taught history in the 1950s, that same textbook is a primary source.
A common approach is to start with secondary sources for background and context. This helps you know what questions to ask. Then turn to primary sources to test those claims against the evidence itself. When several independent primary sources agree, an argument becomes stronger. When they conflict, the historian has to explain why. Throughout, you should keep asking how close a source is to the events and how much interpretation it contains.
