The two people in the photo are ludwig wittgenstein (right) and Ben Richards (left).

Ludwig Josef Johann Wittgenstein; 1889 April 26th-1951April 29th, born in Austria, a member of the Wittgenstein family, and later became a British citizen. Wittgenstein is one of the most influential philosophers in the 20th century. His research fields are mainly philosophy of mathematics, philosophy of spirit and philosophy of language.

I believe the photo was taken in London, probably between 1939 and 1947, because Wittgenstein has been teaching at Cambridge University at this time.

The man on the left of the photo can't be verified now. I believe he is a friend of Wittgenstein.

It is worth mentioning that some people on the internet say that the left-wing talent is Wittgenstein, which is actually a fallacy.

See the cover of his own book for details.