The state or condition of being retroactive.(noun)
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Use "retroactiveness" in a sentence
"It is true that non-retroactiveness may let a lot of KMT off the hook."
"I like the retroactiveness-or retro-attractiveness-of this process, and I li ke what it reveals about the mind: that it is cheerfully storing so much all the time, generating infinite cubbies each with its single broken or torn fragment waiting for a match."
"It's the retroactiveness of "womanhood", as well as the "instantly really a woman, the same as every other woman" that I'm talking about."