A Short History of Ledgers

The history of ledgers is more intriguing than you might think. This journal traces notable moments in the evolution of immutable, double-entry, and scalable ledgering.

What Is a Ledger?

The dictionary tells us a ledger is a book of accounts containing debits and credits “posted from books of original entry” [ 1]. Books of original entry contain the first records of a transaction—transactions that are then transferred to a ledger.

Another meaning? A ledger is a flat stone covering a grave. Given the origins of the word (purportedly derived from leyen or leggen in Middle English, “to lay”), it’s not hard to conceive of an accounting ledger as the place data recorded elsewhere is formally laid down (or even laid to rest).

In terms of record keeping, examining historical ledgers spotlights the data people found most pressing and vital to record. Indeed, ledgers from times past provide a window into the obsessions, nuances, nitpicks, and values of daily life across centuries.

Historical Ledgers: The Evolution of 3 Key Attributes

A beneficiary of the legacy we’ll examine below, Modern Treasury offers a financial ledger database. This article will employ the three essential characteristics of modern financial ledgers to dig into the history and evolution behind this seminal technology: ledgers should be immutable, double-entry, and scalable. Let’s explore each of these attributes as they relate to the historical transformation of ledgers.

Immutability

The first known ledgers not only provide a record of early accounting—they also showcase the primary origins of written language. Clay tablets from Mesopotamia (modern day Iraq)—the earliest dating back to 3400 B.C.—were used to account for grain and workers as part of business, bureaucratic, and personal record keeping. As you’ll see from the examples below, the immutability (or total resistance to change) exhibited by these tablets is mighty.

Pictographs combining pictures and words (also called Proto-Cuneiform) evolved into Cuneiform, what historians recognize as the first form of written language. These pictographs were arranged in rows and columns, with pictures to represent people and items, and holes to indicate quantity.

As one writer puts it, “the ancients invented Excel before Word!” To see more, access an incredible archive of Cuneiform accounting here.

Fun fact: not all early ledgers were meant to be immutable. In fact, clay was often used historically for daily records— records that could be removed by adding water to the clay to make it soft again. Ledgers deemed significant enough were fired to preserve the immutability.

Why immutability matters

In software, immutability helps ensure data integrity. Because ledger entries are “append-only,” a historical record is generated that is immutable—if mistakes are made, they are corrected with a subsequent entry.

Double-Entry

The introduction of double-entry bookkeeping is widely considered the birth of modern accounting. Although the official start of the double-entry method is contested (with some linking the true origins to Rome, China, and the Middle East), Italian mathematician Luca Pacioli tends to get credit.

Pacioli included a detailed explanation of double-entry accounting in his massive book, Summa de arithmetica, geometria, proportioni et proportionalita, published in Venice in 1494 [ 2]. Double-entry methods caught on quickly—they were first adopted by the marketplaces of Venice, and eventually by international trade networks, remaining a fixture in business and commerce to this day.

Capacity For Scale

Just as clay was overtaken by paper as a primary record-keeping tool, ledgers have necessarily evolved as businesses grow, needs change, and technology accelerates. At a high level, we can trace the evolution of ledgers from tools (stylus and stone), to books, to the internet—in each case the potential for growth and scale increasing.

From Past To Present With Modern Treasury

In researching for this article, I checked “ledger” on Google Trends—if you follow my course, you’ll see a sizable peak in search traffic during 2008. This is linked to both crypto (Ledger’s hardware wallets) and Heath Ledger (of the Dark Knight), with the bulk pursuing content on the latter. (RIP, Heath; you were incredible.)

That said, ledgers (and modern ledgering solutions) are more than a trend. From clay-based accounting and the abacus to APIs, our arrival at today’s money movement software was hard won and (we believe) worth the wait. Ledgers from Modern Treasury is the next evolution of immutable, double-entry, and scalable accounting.