The article The Bell Curve, along with other articles relating to the area of conflict (namely, the intersection of race/ethnicity and human abilities and behaviour, broadly construed), is currently subject to active arbitration remedies, described in a 2010 Arbitration Committee case where the articulated principles included:

• Pillars: Wikipedia articles must be neutral, verifiable and must not contain original research. Those founding principles (the Pillars) are not negotiable and cannot be overruled, even when apparent consensus to do so exists.
• Original research: Wikipedia defines "original research" as "facts, allegations, ideas, and stories not already published by reliable sources". In particular, analyses or conclusions not already published in reliable, third-party, published sources with a reputation for fact-checking and accuracy are not appropriate for inclusion in articles.
• Correct use of sources: Wikipedia articles should be based on reliable, published secondary sources and, to a lesser extent, on tertiary sources. Primary sources are permitted if used carefully. All interpretive claims, analyses, or synthetic claims about primary sources must be referenced to a secondary source, rather than to original analysis of the primary-source material by Wikipedia editors.
• Advocacy: Wikipedia strives towards a neutral point of view. Accordingly, it is not the appropriate venue for advocacy or for advancing a specific point of view. While coverage of all significant points of view is a necessary part of balancing an article, striving to give exposure to minority viewpoints that are not significantly expressed in reliable secondary sources is not.
• Single purpose accounts: Single purpose accounts are expected to contribute neutrally instead of following their own agenda and, in particular, should take care to avoid creating the impression that their focus on one topic is non-neutral, which could strongly suggest that their editing is not compatible with the goals of this project.
• Decorum: Wikipedia users are expected to behave reasonably, calmly, and courteously in their interactions with other users; to approach even difficult situations in a dignified fashion and with a constructive and collaborative outlook; and to avoid acting in a manner that brings the project into disrepute. Unseemly conduct, such as personal attacks, incivility, assumptions of bad faith, harassment, or disruptive point-making, is prohibited.
• Tag-team editing: Tag teams work in unison to push a particular point of view. Tag-team editing – to thwart core policies (neutral point of view, verifiability, and no original research); or to evade procedural restrictions such as the three revert rule or to violate behavioural norms by edit warring; or to attempt to exert ownership over articles; or otherwise to prevent consensus prevailing – is prohibited.

If you are a new editor, or an editor unfamiliar with the situation, please follow the above guidelines. You may also wish to review the full arbitration case page. If you are unsure if your edit is appropriate, discuss it here on this talk page first.