Throughout his 50 years as publisher of the Toronto Star from 1899 to 1948, Joseph E. Atkinson developed strong views on both the role of a large city newspaper and the editorial principles it should espouse. These values and beliefs now form what are called the Atkinson Principles. For more than a century, they have provided the intellectual foundation on which the Star has operated and have given the paper its distinctive voice.

The editorial principles Atkinson espoused were founded on his belief that a progressive newspaper should contribute to the advancement of society through pursuit of social, economic and political reforms. He was particularly concerned about injustice, be it social, economic, political, legal or racial.

Fundamental to his philosophy was the belief that the state has the right, and duty, to act when private initiative fails. While Atkinson's beliefs were never codified in any set form, the central Principles can be summarized as follows: