Equality of capacity
Two central issues for ethical analysis of equality are: (1) Why equality? (2) Equality of what? The two questions are distinct but thoroughly interdependent, We cannot begin to defend or criticize equality without knowing what on earth we are talking about, i,e., equality of what features (e,g., incomes, wealths, opportunities, achievements, freedoms, rights)? We cannot possibly answer the first question without addressing the second, That seems obvious enough.