The alternative you are asking for, as I see it, is first of all an alternative system of belief. True, meaningful change cannot be born of the current, hopelessly corrupt political and economic system. The current system is founded on a corrupt and obsolete system of beliefs. To change the current political and economic system, we must first (or concomitantly) change the corrupt and obsolete system of beliefs that undergirds it.
Are we in agreement thus far?
Now, we cannot change the system of beliefs that undergirds the deranged and idiotic Establishment if we continue to buy into that Establishment. Appealing to the Establishment to please, pretty please stop warmongering – stop treating people as disposable, stop treating Earth as disposable – is buying into the Establishment. It is pretending that the Establishment will listen. It is pretending that we still have democratic representation and recourse to the law. We do not have democratic representation in Washington, DC. We do not have recourse to the law anymore. We must be candid about these facts if we are to have hope of changing the system of belief that stands at the base of our ecocidal/ homicidal/suicidal economic and political system.
Those who believe they can coax an ecocidal system to change through linear, utilitarian methods have made a fundamental error. It is an error that reinforces the Establishment and prevents meaningful change from happening. Meaningful change will not happen incrementally, linearly, along utilitarian lines. That is not how belief systems evolve. If the global political-economic system was not fundamentally, irredeemably cannibalist/capitalist, then working within that system would be logical. But this is not the case. There is no representation of the People. There is no democracy. There is no recourse to the law. We are living under a fully-fledged, fully mature, global neoliberal/fascist system. When you pretend that your political representatives are responsive to the People, you merely participate in ruling class myth-making, and this serves to reinforce the Establishment.