When I was a kid, our artificial tree’s stand was mounted on a 2’ x 2’ piece of plywood to steady the base, then there were eye hooks mounted on the window casing about 4 feet from the ground (these remained there year round, obscured by the curtains). Once the tree was assembled, a length of twine was wrapped around the tree's trunk and secured to the hooks. Apparently, between the kids and the cats, they had had some problems, and my dad decided to put an end to tree toppling forever.
Next time I see him, I should ask about the incident that prompted him to break out the saw, drill and twine. Fun memories.