We became familiar with ERGs when many welcomed us to speak on the gender and racial justice themes we write about in our books. As one of the most powerful trends in the U.S. workplace, ERGs are a way for underrepresented groups to band together to help recruit more talent like them into their companies and make sure that talent feels supported and gets promoted. ERGs act as advocates, so no individual has to stick their neck out alone. Some groups have tens of thousands of members and in some of the best-run ERGs, these groups even identify new customer segments and products for neglected demographics that result in more revenue.