John Mackinnon Robertson PC (14 November 1856[1] – 5 January 1933[2]) was a prolific Scottish journalist, advocate of rationalism and secularism, and Liberal Member of Parliament for Tyneside from 1906 to 1918.

At the 1918 United Kingdom general election, as a Liberal candidate he contested Wallsend, a constituency based largely on his Tyneside seat, but finished third.

[16] Robertson was an advocate of the Christ myth theory, and in several books he argued that Jesus was not a historical person, but was an invention by a first-century Jewish messianic cult of Joshua, whom he identifies as a solar deity.

[17][21] He wrote that possible origins were: a would-be messiah who preached "a political doctrine subversive of the Roman rule, and to have thereby met his death";[22] and a "Galilean faith-healer with a local reputation [who] may have been slain as a human sacrifice at some time of social tumult".

[24]Robertson viewed references to the twelve apostles and the institution of the Eucharist as stories that must have developed later among gentile believers who were converted by Jewish evangelists like Paul.