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What Is Truth Decay?

• Truth Decay is defined as a set of four related trends: increasing disagreement about facts and analytical interpretations of facts and data; a blurring of the line between opinion and fact; an increase in the relative volume, and resulting influence, of opinion and personal experience over fact; and declining trust in formerly respected sources of factual information.

Is Truth Decay New?

• This report explores three historical eras — the 1890s, 1920s, and 1960s — for evidence of the four Truth Decay trends and compares those eras with the past two decades (2000s–2010s). Two of the four trends occurred in earlier periods: the blurring of the line between opinion and fact and an increase in the relative volume, and resulting influence, of opinion over fact. Declining trust in institutions, while evident in previous eras, is more severe today. No evidence of an increase in disagreement about facts and analytical interpretations of facts and data was seen in the earlier periods.

What Causes Truth Decay?

• Four drivers, or causes, of Truth Decay are described: cognitive bias, changes in the information system (including the rise of social media and the 24-hour news cycle), competing demands on the educational system that limit its ability to keep pace with changes in the information system, and political, sociodemographic, and economic polarization. Various agents also amplify Truth Decay's trends.

What Are the Consequences?

• The consequences of Truth Decay manifest in many ways. The most damaging effects might be the erosion of civil discourse, political paralysis, alienation and disengagement of individuals from political and civic institutions, and uncertainty about U.S. policy.