Well there is the notion of conditioning.
IOW we can condition animals to perform a predetermined behavior.
Prime Example is the rodeo.
The Snake River Stampede is one such rodeo that is still going on today. I grew up in Boise Idaho where many of my friends and even family members would participate. Quarter horses were every girl's dream of owning so they could barrel ride faster and better.
Guys roped cattle.
Now cattle/calf roping is just as much the horse as it is the cowboy doing it. The Horse does the heavy, hard work but the cowboy just works the rope.
Girls wanted to join in the fun of calf roping competition...as many of them worked a family farm and did just as much as the men.
But during the rodeo they went all mysogenist on the women...they couldn't do that.
instead the women were allowed to rope goats.
So...the young women practiced.
The thing about women practicing roping goats is that it is a matter of timing. A goat goes into the chute and someone smaks its backside and opens the gate and the goat goes running into the corral. The girl gets her timing down and throws the rope, ties it off to her saddle horn and the horse stands firm knowing whats coming. Maybe even pulling back a little.
The goat has the rope around it's neck and when it gets tight falls over so the girl can tie up it's feet.
Now if a girl has practiced with a goat too much...(this is the part where conditioning comes in)
The goat goes running out of the chute into the corral and even if the girl misses the goat the goat will jerk it's head and fall over at the conditioned place in the corral.
People ain't much different. When introduced to the same circumstances with the same conditions we fall over whether there is a rope around our necks or not. (sheep do the very same thing)
Consequently, many of your "cowboys" in Idaho are nicknamed "Goat-Ropers"
So...
Free Will is there for us. But for some people it is going to be almost impossible for them to take advantage of it. And that can be something as simple as peer pressure.
Such was the pharisees...
Such is us today. 2,000 and we haven't evolved one lick.