Here are a few of the most relevant writings on CEO activism.

2018 Edelman Trust Barometer and Edelman’s Earned Brand 2018

Weber Shandwick’s CEO Activism in 2018: The Purposeful CEO and CEO Activism in 2017: High Noon in the C-Suite

Assessing the Impact of CEO Activism by Aaron Chatterji, Michael W. Toffel

The New CEO Activists, by Aaron Chatterji, Michael W. Toffel in Harvard Business Review

When CEOs Should Speak Up on Polarizing Issues by Alison Taylor, Harvard Business Review

2018 CEO Activism Survey by David F. Larcker and Brian Tayan, Stanford Graduate Business School