What was the essential dispute within islam over the succession to the prophet

Sunnis believe that the successor of Muhammad needed to have a direct blood lineage (be a close relative) of Muhammad. Shias believe in election of the most qualified leader regardless of relationship to Muhammad.

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation:

i see, would you mind putting it as one?