is there a common denominator that we can get behind

So I ask: is there something we can agree on, is there a common denominator that we can get behind that unites us and allows us to finally bring our potential power into the light, into action and into results that help us as a group? I believe that voting is one way, are there others?
https://www.linkedin.com/pulse/our-silence-killing-us-nely-galan
What does the phrasal verb "get behind" mean in the above quotation?
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Support. Is there something we can all support?

UE has a great phrasal verb list. Haven't you found it yet? It's HERE. Scroll to G and then scroll through until you find "get behind".