How did the myth of Jesus' resurrection originate?

[Aractus]

• John 20:1-2
  Now on the first day of the week Mary Magdalene came to the tomb early, while it was still dark, and saw that the stone had been taken away from the tomb. So she ran and went to Simon Peter and the other disciple, the one whom Jesus loved, and said to them, “They have taken the Lord out of the tomb, and we do not know where they have laid him.”
  
  John 20:11-14
  But Mary stood weeping outside the tomb, and as she wept she stooped to look into the tomb. And she saw two angels in white, sitting where the body of Jesus had lain, one at the head and one at the feet. They said to her, “Woman, why are you weeping?” She said to them, “They have taken away my Lord, and I do not know where they have laid him.” Having said this, she turned around and saw Jesus standing, but she did not know that it was Jesus.
  
  Matt 28:1-8
  Now after the Sabbath, toward the dawn of the first day of the week, Mary Magdalene and the other Mary went to see the tomb. And behold, there was a great earthquake, for an angel of the Lord descended from heaven and came and rolled back the stone and sat on it. His appearance was like lightning, and his clothing white as snow. And for fear of him the guards trembled and became like dead men. But the angel said to the women, “Do not be afraid, for I know that you seek Jesus who was crucified. He is not here, for he has risen, as he said. Come, see the place where he lay. Then go quickly and tell his disciples that he has risen from the dead, and behold, he is going before you to Galilee; there you will see him. See, I have told you.” So they departed quickly from the tomb with fear and great joy, and ran to tell his disciples.
  
  Mark 16:1-8
  When the Sabbath was past, Mary Magdalene, Mary the mother of James, and Salome bought spices, so that they might go and anoint him. And very early on the first day of the week, when the sun had risen, they went to the tomb. And they were saying to one another, “Who will roll away the stone for us from the entrance of the tomb?” And looking up, they saw that the stone had been rolled back—it was very large. And entering the tomb, they saw a young man sitting on the right side, dressed in a white robe, and they were alarmed. And he said to them, “Do not be alarmed. You seek Jesus of Nazareth, who was crucified. He has risen; he is not here. See the place where they laid him. But go, tell his disciples and Peter that he is going before you to Galilee. There you will see him, just as he told you.” And they went out and fled from the tomb, for trembling and astonishment had seized them, and they said nothing to anyone, for they were afraid.
  
  Luke 24:1-12
  But on the first day of the week, at early dawn, they went to the tomb, taking the spices they had prepared. And they found the stone rolled away from the tomb, but when they went in they did not find the body of the Lord Jesus. While they were perplexed about this, behold, two men stood by them in dazzling apparel. And as they were frightened and bowed their faces to the ground, the men said to them, “Why do you seek the living among the dead? He is not here, but has risen. Remember how he told you, while he was still in Galilee, that the Son of Man must be delivered into the hands of sinful men and be crucified and on the third day rise.” And they remembered his words, and returning from the tomb they told all these things to the eleven and to all the rest. Now it was Mary Magdalene and Joanna and Mary the mother of James and the other women with them who told these things to the apostles, but these words seemed to them an idle tale, and they did not believe them. But Peter rose and ran to the tomb; stooping and looking in, he saw the linen cloths by themselves; and he went home marvelling at what had happened.

Well they've done a really bad job if they've invented this story because 1. there's four different accounts, and 2. their main witnesses are women not men.

However, we also see that Paul, for instance, takes the resurrection as common knowledge and never bothers to teach on it specifically. Having differing accounts is a good thing, because it means there's more than one witness attesting to it.

Also, we do not have a complete picture to begin with, and even putting all these accounts together we still do not have a complete picture, but what we do have is a larger picture than one account alone is able to convey.

Indeed if all four were exactly the same, you'd claim it was invented by one person and then copied verbatim by others. What is obvious is that there are at least 4 distinctly different narratives of the event that exist at the time the Gospels are written, and this can only be because the 11 told the story in their own ways.

So let's take a few facts they all agree on: Joseph of Arimathea owns the tomb, and has Jesus’ body placed in it, and he is not mentioned anywhere else in the Bible. Mary Magdalene goes to the tomb first, and in the all the synoptic accounts she's accompanied by at least Mary the mother of Jesus. In Mark's account, Salome is also with them. Luke includes Joanna and makes a note that there were other women with them.