Which aspect of employment is NOT illegal to discriminate against?

The aspect of employment that is not illegal to discriminate against is promotion, as it can depend heavily on the judgment of supervisors and the individual qualifications of candidates. Promotion decisions are typically influenced by an employee's performance, potential, and fit for a higher role within the organization. Unlike hiring or firing, which are governed by strict anti-discrimination laws, promotions may involve subjective evaluations and workplace culture considerations, allowing employers some discretion in how they choose individuals for advancement.

In contrast, hiring and firing, job training opportunities, and compensation are all heavily regulated under employment law to prevent discrimination based on race, color, religion, sex, or national origin, among other factors. These areas are closely monitored to ensure equitable treatment of all employees regardless of their background. Understanding the distinctions between these areas can help clarify which employment practices are legally protected against discrimination and which may allow for more flexibility and subjective evaluation.