Sources and documents: research into Facebook's polarizing effect was shelved by Zuckerberg and others, weakening efforts to apply its conclusions to products (Wall Street Journal)

Wall Street Journal:
Sources and documents: research into Facebook's polarizing effect was shelved by Zuckerberg and others, weakening efforts to apply its conclusions to products  —  The social-media giant internally studied how it polarizes users, then largely shelved the research

via Techmeme