Based on the passage by Alfred Russel Wallace, one can conclude the following:
-each race varies greatly within itself (hair, eyes, features, forms, etc.)
-it asks the question, if the entire species thrives in the same way (survival of the fittest) then are there really different races?
-it is not impossible, but just improbable that the distinctive characteristics of each race will change based on a person's geographical location. It has not happened yet.
-for all races, physical characteristics become less important in comparison to influence of the mental and moral qualities (for example, the instinct to help the sick, provide food to the hungry etc.)
-humans have always evolved and adapted to new environments, it would take an extremely significant external stimulus to change the physical features of humans.
-physical features may become permanent because they are less important than the evolution of the brain and mental abilities
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