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Do not conduct conversations that will lead to politics. Keep personal thoughts and opinions that do not concern the company out of it. While at work, you should keep it work based; that is conversations should include work and whatever that has to do with organization.
Be Neutral and do justice to every employee. This will discourage politics among them.
Embed free and open door policy working environment for employees to be more transparent and avoid unnecessary gossips and politics, which is not good in any form,
Regular and effective communication, employee engagement program improve the working culture and build transparent relationship,
Encourage an attitude of neutrality and mutual respect in and around the workspace.
In generally I would say with natural authority and knowledge. For an more specific answer I need more details!