How did the atlantic slave trade lead to the stagnation of africa's culture and economy?

Africans lost many of their ancient cultures because they were inculcated to the European environment through the slave route. Aside from this, many forms of developments in their own agriculture and other sectors were hampered because many of their populations were sent to European countries. 

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.