It is on account of the absence of Brahmanas from among them that the Shakas, the Yavanas, the Kamvojas and other Kshatriya tribes have become fallen and degraded into Shudras.
शका यवनकाम्बोजास्तास्ताः क्षत्रियजातयः। वृषलत्वं परिगता ब्राह्मणानामदर्शनात्॥