In the earlier times of the first map, the wild, low civilization areas were fairly dangerous to live and travel in. Since most area was grassland, you would get constantly harassed by foxes.
When dynamic civilization levels were first introduced, the map's civ level increased to the point where most areas were fairly safe.
Then dynamic civilization levels were made non-linear, and some areas became a bit more dangerous. This carried over into the new map, but since the default land type was forest, the wilderness was more dangerous because of boars and bears.
Recently, the game was made more "noob friendly" by making it so that only bears would attack players. This shifted the balance of the game to make civilization levels not really matter at all with regards to forest safety, and all places essentially became accessible to all players.
I think animal attacks should be brought back. I understand that new players need to be able to wilderness spawn, but I have always thought that the dangers of wilderness travel really added to the survival experience. Perhaps in the next map there could be a greater amount of non-forest, usable (meaning non-swamp) land to let players have a place to live while allowing forest to remain dangerous.
Edit:
Suggested by theTrav:
Greater civilization given by hearth fires, but also quicker falloff so you only get a short "safe zone"
Animal AI that fears fire but will overcome its fear if provoked / tempted
More ferocious animals at night, but make em even more afraid of fire
Animals that will aggro you but can be escaped either by sprinting, climbing trees, or dropping resources.
Suggested by Sabinati:
Animals have limited stamina