Respectfully, this logic reminds me of the leaps commonly seen in crackpot conspiracy theories. I am highly skeptical of any supposed connection between economic equality and increased civil unrest, let alone polygamy.
Critical thinking time. Is there an established link between female self-esteem and polygamy? Let's suppose there is, does polygamy actually hurt communities? Where's the evidence for that? If women are more well-off, is it a zero-sum game that makes men less well-off? If it is zero-sum, are economically insecure young men any more likely to cause civil unrest than economically insecure young women?
Critical thinking time. Is there an established link between female self-esteem and polygamy? Let's suppose there is, does polygamy actually hurt communities? Where's the evidence for that? If women are more well-off, is it a zero-sum game that makes men less well-off? If it is zero-sum, are economically insecure young men any more likely to cause civil unrest than economically insecure young women?