Queen Hecuba of Troy had a strange dream that she would give birth to a torch.
The queen told her husband about her dream. The king was worried, so he called his oldest son, a seer, to explain the message to them. The seer tells them that the torch resembles their soon to be son, Peris, and that this son will be the downfall of Troy.
When Paris was born, the king ordered one of his shepherds to take the baby into the woods and kill it. The shepherd could not bring himself to do it, so he left it in the woods to face certain death. However, a female bear discovered the child and cared for it.
When the shepherd returned the next morning, he found the baby alive and well. He took this as a sign that the baby should live. So he took it to his house and raised him in secrecy.
When the boy grew into a man, he proposed a challenge to his fellow townsmen: If any of their bulls could beat his bull, he will give them a gold crown. Ares, the god of war heard this, and turned himself into a bull so he could win the crown. Ares won and Peris gave him the crown. This was noticed by Zeus.
Zues was getting married to a mortal woman on Mount Olympus when Eris, the goddess of war barged in and threw a golden apple that said: "for the fairest." This caused all the goddess' to fight for the apple. The fight came down to Athena, Hera, and Aphrodite. They demanded Zeus decide who gets the apple. Zeus, not wanting to choose sides, commands Peris to choose. Perish chooses Aphrodite after she promises his wife will be Helena, the most beautiful woman in the world. This causes the Trojan war because Helena is married to the king of Troy.