In his Aug. 12 resignation letter, Brabeck-Letmathe said he had personally witnessed a “toxic work environment” for several months and that the only way to move forward was for the board to seek an “amicable agreement” with Schwab to resolve the dispute. Brabeck-Letmathe has served for years on the Forum’s board.

The World Economic Forum has cleared Klaus Schwab of “material wrongdoing” after a law firm conducted a review into potential misconduct of the institution’s founder.

The World Economic Forum concluded an investigation into founder Klaus Schwab and found no evidence of misconduct. The investigation began after a whistleblower letter spurred Schwab’s resignation as chairman.