This is a great question. The political solutions that have been proposed to respond to climate change are generally way less urgent and rapid than what the Pledge to Mobilize calls for. There are exceptions, such as Lester Brown's Plan B 4.0, written in 2009, which advocates an 80% reduction in global greenhouse gas emissions by 2020, or Paul Gilding and Jorgen Rander’s One Degree War Plan, which cuts global greenhouse gas emissions in half in five years, starting in 2018. But generally, proposals for emissions reductions, whether coming from elected leaders (such as Obama’s plan to reduce emissions from power plants 30% from 2005 levels by 2030, effectively reducing U.S. carbon emissions 6% over a 15 year period) or from NGOs (such as 350’s campaign to fight the approval of the Keystone pipeline) are more modest than those of the Climate Mobilization.
While other climate organizations have done excellent work in raising awareness of climate change and preventing the expansion of the USA's fossil fuel infrastructure, they have tended to limit themselves to battles that are "politically feasible." Understandably, organizations want to take on fights they think they can win. There is a widespread belief that climate change communicators (expressed in this article, or this communications guide for example) cannot be honest about the dire risks posed by climate change, because it makes people tune out and turn off.
The good news is that we believe that the Pledge to Mobilize strategy can fundamentally alter what is politically feasible! We believe that denial comes primarily from feeling helpless, not just from feeling afraid. When people are offered viable solutions that they can be a part of, such as the Climate Mobilization and the Pledge to Mobilize, they are much more able to cope with the frightening truth.
We hope, that other climate organizations (as well as professional associations, civic associations, unions, veterans associations, political parties, and other groups) will realize that the Pledge to Mobilize is a game-changing social technology, and will integrate it into their operations.