The Ingalls, the Wilders, the Olesons... and many more influenced a lot of lives. Lots of people watched the show and still do, although they almost know every single episode, me included. What is it that makes this show a classic that is watched and loved so much?
I guess the family life in LHOTP is shown as something that is worth fightig for. When you need help, someone from your family or friends is there and stands by your side.
Another aspect is that we learn something from America's past and how things like the railway influenced little towns and farmers.
Next, the show is humerous and heart-warming.
There are a lot of things I could tell you that I like but that would go to far, I guess.
Lets just say, it's a great show and worth watching, even when you already know how it ends...