But, as to your actual question of "why" there is a lot that goes into it. Henry Robinson Towne is a central figure in particular, but so is the great lock controversy of 1851, which was a watershed moment in how most english-speaking societies dealt with mechanical security ever after.
"...the great lock controversy of 1851..." That's so quaint. I wonder if "The Browser Wars", or something of its ilk, will have the same ring to it in 160 years.