They used latex from trees to create rubber
I would say that the stirrup allowed for quicker mounting of the horse, and it may have caused horses to be used in battle more frequently.
Answer: blacks were slaves
Explanation:
The public strongly criticizes the Ox-Bow Route designed by the Butterfield overland trail to deliver mails. They now that in the end, it will only be a big failure. They strongly question the long route and the wilderness that mail delivery face, they argued that even with enough supplies and coaches it will still be a failure.
Contrary to popular belief, Africa's civil wars are not due to its ethnic and religious diversity. Using recently developed models of the overall prevalence of civil wars in 161 countries between 1960-1999, we draw lessons with special reference to Africa, showing that the relatively higher prevalence of war in Africa is not due to the ethno-linguistic fragmentation of its countries, but rather to high levels of poverty, failed political institutions, and economic dependence on natural resources. We argue that the best and fastest strategy to reduce the prevalence of civil war in Africa and prevent future civil wars is to institute democratic reforms that effectively manage the challenges facing Africa's diverse societies.