Well this is a very broad question. I can only say epics do not happen because they have to happen. Great sages from ancient times written those great works to mention comming generations about how they need to lead life and what happened to various people who obeyed or disobeyed god and dharma.These epics are serving the sole purpose of enlighting the generations. Kaliyuga is the last part of the Mahayuga (which contains kruthayuga, threthayuga, dwaparayuga, kaliyuga) and after kaliyuga the clock resets to kruthayuga where these dharmas are no longer valid and have more stricter rules. Anlayzing those epics what scholors conclude is in kruthayuga the god and bad are seperated by planets. Gods recided in urdhva lokas and demons in adho lokas and when ever there are problems god took incarnation of some form and killed those demons. In threthayuga, good and bad were in the same world and seperated by kingdams (Rama and Ravana). God just not changed his form but rather took birth and not only he killed ravana but also shown the world how one should lead life to attain higher world and ultimately moksha. In dwaparayuga good and bad were in same family (Kauravas and Pandavas), then god motivated good people, corrected them and made them kill the bad ones. He did not do it by himself. In kaliyuga good and bad are in same person, no one is perfectly good or bad. So in kaliyuga people do not change much by teachings or preachings or even model living and people tend become more bad as the kaliyuga progress. Hence the only way to correct is by creating maha pralaya (destruction as kalki).

Well, this is a very broad question. I can only say epics do not happen because they have to happen. Great sages from ancient times written those great works to mention coming generations about how they need to lead life and what happened to various people who obeyed or disobeyed god and dharma. These epics are serving the sole purpose of enlighting the generations. Kaliyuga is the last part of the Mahayuga (which contains kruthayuga, threthayuga, dwaparayuga, kaliyuga) and after kaliyuga the clock resets to kruthayuga where these dharmas are no longer valid and have more stricter rules.

Anlayzing those epics what scholars conclude is in kruthayuga the god and bad are separated by planets. Gods recided in urdhva lokas and demons in adho lokas, and whenever there are problems, god took incarnation of some form and killed those demons. In threthayuga, good and bad were in the same world and separated by kingdoms (Rama and Ravana). God just not changed his form, but rather took birth, and he not only killed ravana but also showed the world how one should lead life to attain higher world and ultimately moksha. In dwaparayuga, good and bad were in the same family (Kauravas and Pandavas), then god motivated good people, corrected them, and made them kill the bad ones. He did not do it by himself.

In kaliyuga good and bad are in the same person, no one is perfectly good or bad. So in kaliyuga people do not change much by teachings or preachings or even model living, and people tend to become more bad as the kaliyuga progresses. Hence the only way to correct is by creating maha pralaya (destruction as kalki).