Personally, I think it is somewhat too late and also a good time to change what is going on in our environment because, we can’t go back in time and change anything so we have already lost a ton of animals and everything but besides that, if we all stopped RIGHT NOW and literally didn’t use our cars, stopped manufacturing stuff in big factories, and just dropped what we were doing there would be a MASSIVE change, so yeah.
The last scene in the play reconnects with the very first. He tells Miep that he's going to go away. She begs him to stay, but we can't help but empathize with Mr.Frank.
