What is the difference between "Allein auch in die menschliche Gemeinschaft tritt die natürliche Schwäche hindernd und störend ein" versus "Allein in die menschliche Gemeinschaft tritt die natürliche Schwäche hindernd und störend ein". The last sentence is easy to understand. What is the added meaning of "auch" in this context?
2 Answers
"Allein" - Solely, only
"Allein auch" - In addition, also, not only
The auch implies that not only the "natürliche Schwäche" enters the "menschliche Gemeinschaft" but also something else (not specified in your excerpt but implied).
"Allein in die etc." means solely, only (tantum). "Allein auch etc." points out that "die natürliche Schwäche" also enters the brotherhood of man.