In Paranormal Activity 2, Ali (Daniel's daughter), found out that a human can make a deal with a demon for wealth or power by forfeiting the life of their first-born son. She also realizes that until Hunter, there had not been a male child born in Kristi and Katie's family since the time of their (Katie and Kristi) great-great grandmother, who probably made the deal with the demon or the great grandmother or the grandmother (in Paranormal Activity 3) of Katie and Kristi. This is why their grandma asks Julie (Katie and Kristi's Mom) to have another child so that she (Julie) has a chance to have a male she had always wanted (Julie doesn't know about the demon) but Julie refuses making her useless to the grandmother of Katie and Kristi and Toby, the demon.
This is probably why she was killed in Paranormal Activity 3 and that the demon now stalks Katie and Kristi who the demon hopes will have a baby boy. In Paranormal Activity 3 Dennis (Julie's Boyfriend) found out that demons can make contact with children just like how Kristi can talk and see Toby and that Hunter (Kristi's son) can see Toby in Paranormal Activity 2. Dennis also found out that there is a demonic or witches coven that brainwashed young girls into having sons when they are older (old enough to get pregnant).
The covens symbol is found in Katie and Kristi's closet which the demon had written on the wall and the grandmother's house in Paranormal Activity 3. This means that their grandmother is in the coven. The coven is linked to the human who had made a deal with a demon (as said before).
The human is either Katie and Kristi's grandmother, great grandmother or great great grandmother and the demon is Toby. The coven consists of females from a range of families who made a deal with Toby, one of them being Katie's family. In Paranormal Activity 3, Toby talks to Kristi probably about her joining the coven and having a son but she refuses so Toby pulls Katie into their closet and attacks her making Kristi promise Toby that she'll do it so that Katie is released.
I think this is why Kristi was possessed first when they are older in Paranormal Activity 2. At the end of Paranormal Activity 3, Dennis finds Katie crying by Julie's body. He slowly approaches Katie from behind.
As he does, Katie turns and unleashes an inhuman scream and throws him to the other side of the room, injuring his leg. Katie runs away. Dennis tries to crawl toward Julie but Julie's mother walks into the hallway and stops in front of him.
Dennis stops and as Julie's mother looks down on him, his body is suddenly and violently contorted, snapping backwards and killing him. Katie reappears and runs to her grandmother, who beckons to Kristi. As they head upstairs, Kristi calls to Toby.
Upstairs is where Katie and Kristi is brainwashed, that is why they had forgotten what had happened when they were children. They lived with their grandmother after that. After Kristi was possessed, Martine (The nanny/housekeeper of Kristi in Paranormal Activity 2) was called in by Daniel (Kristi's new husband or boyfriend) to prepare a cross that will pass the demon on to another blood relative; Kristi will have no memory of having been possessed.
(The cross appears to be the one Micah finds Katie clutching, toward the end of Paranormal Activity 1 just before Katie kills Micah). Dan tells Ali that he is going to pass the demon onto Katie so that Kristi and Hunter will be saved. Although Ali begs him not to because it is unfair to Katie, Dan sees no other way to save his wife and son.
Daniel is successful and three weeks later, Katie visits and explains how strange things have now begun happening at her house. On October 9th, the night after Micah is killed, Katie, possessed and bloodstained, breaks into Dan and Kristi's home and kills Dan by breaking his neck. She then goes upstairs and attacks and kills Kristi in Hunter's room, violently hurling her against the camera and taking the baby.
Katie leaves the room, cradling Hunter with a satisfied look on her face. The screen fades to black as Hunter's crying dies down and turns into laughter making Toby successful.
First to under stand three you must under stand 1 and 2 ok so the story is that 1 and two happened at the same time and the third is the story of how it all began so the grandmother summoned a Demon for wealth (now the second comes to a play) the grandmother told the demon that it can have the first born son and in return she will have wealth and then hunter is born then the family find out a family member made a deal with the demon of giving the first born son in the family for wealth so when kristi gets possesed the dad and daughter decided to transfer the Spirit to kristi's sister katie so now were in the first movie so then Katie and Micah notice things happening in the house Katie tells Kristi about it and then weeks later Katie goes up at Kristi's house wearing bloody pajamas. She walks up behind the dad and breaks his neck then goes upstairs kills Kristi and steals the baby Hunter. (the demon possessed Katie and used her to get the baby) that's how it ends and then the third comes in so this is when the girls are little and how their life was before everything hoped this helped and if you still don't get it im sorry that's as clear as I can make it sound :).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.