Starter will turn

I have had this vehicle for 2 years, it never failed to start. I moved on my
property 100 yards and used the radio on accessory , after that when I
turned the key , the lights came up but no starter engaged. I tried jumping
the starter direct with the key in the on position, it turned as normal but
would not start it. I tested the park position with jiggling the shifter then tried
neutral also with jiggling it, nothing. The alarm works in both on and off , and
I have seen plenty of people with this same predicament.