Government-Unitary state, Presidential system, Constitutional republic. It's not weak.
Economy- trade, facts business. And they traded stuff like gold and cocoa.
Collapse- it's been going for 445 years and still is in Africa
The kingdom of mahli
Government- Islamic republic a particular form of government adapted by some Muslims states.
Economy- The economy of mahli is based to a large extent on agriculture, with a mostly rural population, many of whom are engaged in substance agriculture
Collapse- The Mali empire last from 1235 to 1610
The kingdom of Songhai
Government- It was a central government
Economy- Was based on iron and bold and mining along with agricultural
Collapse- Lasted from 1340 to 1591 a total of 251 years