Causation in Civil Rights Legislation

39 Pages Posted: 11 Feb 2021 Last revised: 18 Nov 2021

See all articles by Hillel J. Bavli

Hillel J. Bavli

Southern Methodist University - Dedman School of Law

Date Written: January 15, 2021


Employees are often left unprotected from discrimination because they are unable to satisfy the requirement of causation. Courts have made clear that to obtain legal redress for discrimination, it is generally insufficient to show that a protected characteristic such as race or sex was a “motivating factor” of an adverse employment decision. Rather, under Supreme Court precedent—including the Court’s Comcast and Babb decisions in the 2020 term—the antidiscrimination statutes generally require a showing of “but-for” causation. Consequently, many victims of discrimination will be unable to prevail because an employer can readily refute allegations of discrimination by asserting a legitimate purpose—true or not—for the adverse decision. Therefore, although there is good reason to reject the motivating-factor test, the but-for requirement undermines the objectives of antidiscrimination law.

In this Article, I draw on notions of cause and effect in the sciences and in tort law to propose a new standard of causation for antidiscrimination law. In particular, I formulate a simple test—which I call the “fortified NESS” test, or “FNESS”—for courts and legislatures to apply as a uniform and effective standard of causation in all disparate-treatment cases. I then employ this formulation to propose concrete amendments to the civil rights statutes, and I demonstrate why these amendments are necessary and how they allow courts to uphold the critical aims of antidiscrimination law.

Keywords: discrimination, antidiscrimination, civil rights, employment discrimination, causation, motivating factor test, but for causation, legislation, Title VII, statutory interpretation, multiple sufficient causes, ness, mixed motive, disparate treatment, tort law, potential outcomes, cause and effect

Suggested Citation

Bavli, Hillel, Causation in Civil Rights Legislation (January 15, 2021). 73 Alabama Law Review 159 (2021), SMU Dedman School of Law Legal Studies Research Paper No. 497, Available at SSRN: or

Hillel Bavli (Contact Author)

Southern Methodist University - Dedman School of Law ( email )

P.O. Box 750116
Dallas, TX 75275
United States

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