Why did feudalism develop as a political and social system?

Europeans were in fear from raids (Vikings and Magyars)- No strong central government so local leaders had to protect.

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .