It started with a problem.
The territorial sales force model developed alongside the growth of national consumer goods companies in the late nineteenth century. Companies like NCR (National Cash Register) under John Henry Patterson from the 1880s onward assigned salespeople to defined geographic areas, forbidding them from selling outside their territory and protecting them from competition by colleagues inside it. Patterson's NCR sales force is often cited as a model for territorial sales management — he developed training programs, sales scripts, quotas, and commission structures. Many of the early twentieth century's most influential sales managers began their careers at NCR.
Historical sources below ↓Then something changed.
Sales territories changed the accountability structure for field sales. With assigned territories, each salesperson was responsible for all customers and prospects in a defined area — and their quota was set based on the estimated potential of that area. This made performance assessment more equitable: a salesperson in a high-potential territory was expected to produce more than one in a low-potential territory. It also created ownership of customer relationships: a territory's salesperson knew their customers personally, visited them regularly, and bore the consequences of lost business. The model's weakness was geographic inflexibility — as customers became national and buying decisions centralized, the geographic territory became less relevant.
What a builder can learn.
Our interpretation: sales territories solve a specific organizational problem — preventing internal competition for the same customer. They do this by assigning ownership of customer relationships to specific people. For a business builder with more than one salesperson or account manager, the question of how to divide customer responsibility — by geography, by industry, by company size, by product — determines who owns the relationship, who earns the commission, and who is accountable when a customer leaves.
A door still open.
A hypothesis worth testing: if a small business with multiple people interacting with customers assigned each customer account to a single owner — one person primarily responsible for the relationship — and measured customer satisfaction and retention against accounts with no single owner, would the owned accounts show better retention and more complete understanding of customer needs?
For each of your major customer relationships, who is the single person most responsible for that relationship — and does that customer know who that is?
Follow the evidence.
History is sourced below. Business lessons are editorial interpretations; future possibilities are questions to test, not predictions.
Prepared from primary-source histories. First edition: 25 Sept 2026.