Why did Dr. BR Ambedkar convert to buddhism? Me text-book and dad(historian + buddhist) told me that the father of the indian constitution converted into buddhism towards the end of his life.

Can anyone please tell me why he did so?

Tnx for all the help
i think Wikipedia articles on the man and on the Dalit emancipation movement give some insight into his reasons

https://en.wikipedia.org/wiki/B._R._Ambedkar#Conversion_to_Buddhism
https://en.wikipedia.org/wiki/Dalit_Buddhist_movement#B._R._Ambedkar

they appear to be primarily socio-political rather than existential and spiritual