Mention divestment, and the first alternative that is usually presented is shareholder engagement (also called shareholder activism). In shareholder engagement, those that own stock in a company attempt to positively influence that company’s behavior to get them to reform their ways. This can include shareholder resolutions where shareholders propose changes and convince others to vote in favor, or all the way to hedge fund proxy contests to buy up more stake in a company.
This is potentially an effective method when the issue with a company is a management style or policy which the company currently practices that can be reformed. Convincing a company in the fossil fuel industry to reform their business practices is one thing. But shareholder activism fails for a few reasons
*The issue of fossil fuel companies is fundamental to the companies themselves. Simply making their products a bit less polluting or their practices a bit less GHG intensive won’t address the problem: the problem is the very notion of the extraction, combustion or processing of fossil fuels (not to mention the very unjust and unethical manner which it currently entails).