Most forest fires are arson, true? However, I am old enough to remember that back in the 50's and 60's, there were very few major conflagrations of the intensity and range that have occurred in the past decade. Closed forests are nothing but tinderboxes waiting for a spark, natural or man-made.
More people, more media.
One of the reasons for this current Pinedale fire disaster is that decades ago Pinedale was two ranches. Period. Now they have tennis, golf, condos, boutiques, gas stations, miles and miles of paved roads to attract tourists, etc. Including a home of the Governor of Arizona, who was not born here, but does use state transportation for weekend trips from the state Capitol.
So many factors.
Strict immigration control should have started around 1490.