More accurately put, create the vision for all your people of the big picture
It all begins with the vision and mindset of the CEO. If they live the right values and culture it will cascade to all levels.
Ensure your people feel safe in sharing thoughts and ideas with each other and senior managers
Ensure your leaders are showing their people what right looks and feels like. It is easy for them to replicate once they have felt it themselves
When you see something right, even if the person is not a part of your team, reward and recognise the right behaviours. This will drive copy cat behaviours from others that see or hear about your recognition.