They have also collaborated on four films about African traditions.
As with many African traditions, age is very important.
In its music, art and religious icons, African traditions are powerfully felt.
"The African tradition of recorded history is completely bound up with the visual arts, and we haven't moved away from that."
African tradition holds that there is a library within every living elder.
"It's a well-known African tradition to make a point using stories, and we hope it will prevent our report from being forgotten."
Ali lived to be around 100 years old and maintained some African traditions in the family.
Brotherhood members follow a strong leader, in keeping with African tradition, and leadership is passed down through sons.
The holiday is a time to celebrate the relationship between the living and the dead, an African tradition brought here by slaves.
In the best African tradition, it mixes entertainment and commentary.