"A history". As I said, you are interpreting that word differently than they are. I think it's valid to interpret "a history" to mean "something that happens with some amount of frequency". I also suppose it's valid to interpret "a history" as "something that's every happened".
At the end, you write "don't and have never never endangered", which is something only you are saying.
At the end, you write "don't and have never never endangered", which is something only you are saying.