What symbol was designed by artist Gerald Holtom in 1958? What is its symbolism?

The vertical line in the center represents the flag semaphore signal for the letter D, and the downward lines on either side represent the semaphore signal for the letter N. “N” and “D”, for nuclear disarmament, enclosed in a circle. Holtom also described the symbol as representing despair, with the central lines forming a human with its hands questioning at its sides against the backdrop of a white Earth. It is said that Holtom originally considered using a Christian cross but disliked its association with the Crusades and ultimately chose something he considered to be more universal.