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Europeans did not understand African ethnic identities.
Every country in Europe has many ethnic groups. For example, in the United Kingdom you will find people of European descent, African descent, Asian descent, Middle Eastern descent, etc. You will find this in all European countries.
Kurds, Palestinians, India, & Catalonia or Britanny (:
Ethnic heritage links nations since there can be so many ethnic groups in one country that are united together. They are all connected in that country and can work together.
I am going to say the Jews. I say it is the Roma people.
The Berlin Conference of 1884-85. Many European nations met to decide on what to do about where nations were allowed to Colonize, trade, and help stop Slavery (which at the time existed in Africa but had been nearly completely abolished in Europe).
Polish, white european.
Indo-European
European is too broad a term to provide a meaningful answer, Europe comprises MANY sovereign countries all with their own ethnic history.
ethnic diversity
nationalism
Black with European ancestry