Brown won the support of a group of Abolitionist leaders. They formed a secret committee and called themselves the Secret Six. They agreed to advise Brown and, more importantly, to raise one thousand dollars for him.
That said, if you're leading a team in English, there are some common cultural values you're likely to find, and these include direct idea exchanges with obvious invitations to contribute.
As team members contribute, their ideas fosters an environment where everyone feels safe and they know they won't be blamed, criticized, or shamed for contributing a poor idea.