Let me begin by defining two terms that I use in the title. By “mirror images” I mean people who look alike based on certain physical characteristics they have in common. These characteristics may not be exactly the same, but they are close enough that people are both self-identified and other-identified as looking the “same.”
By “shared standpoints” I mean that people who have these are commonly enough situated in a set of circumstances or conditions due to shared factors such as ‘race,’ class, ethnicity, religion, sex etc. that they have a common perspective vis-á-vis a number of issues. People can have a shared standpoint on the basis of any one of these factors in common, or, a combination of them.