To initiate a class action case in virtually any jurisdication, there are a number of pre-requisites you will have to satisfy the court are met. These include demonstrating that there are enough "class members" (i.e. individuals or entities who have faced the same or virtually identical conduct of which you are complaining) to warrant treating the case as a class action. The other factors include the adequacy of you and your attornies to represent all of the class members, the "commonality" and "predominance" of the issues that you claim are typical of all the class members, and the "superiority" of proceeding as a class action as opposed to allowing individual class members to pursue their own claims. Every jurisdiction is different in how it analyzes these factors, so you will need to consult with an attorney experienced in class action and/or "mass tort" litigation.