Abstract
This article explores the evolving relationship between the concept of discrimination in international labour law and the socio-economic phenomenon of inequality at work. While non-discrimination was initially understood as a fairly limited legal principle mandating equal treatment for similarly situated individuals, it subsequently expanded to address indirect discrimination resulting from apparently neutral rules, standards and practices at work. It has expanded further to take on group-based patterns of inequality at work related to the structural constraints of the market, the family and community life, ultimately resulting in convergence between anti-discrimination law and legal initiatives to reduce class-based socio-economic inequality and poverty.