David Attenborough is senile; a lefty has-been who is making a fool of himself and everyone who takes him seriously.

ttbn: Mirror, mirror on the wall, who is the greatest fool of all?

Incidental and again just for you, a constraint is something that prevents something, hopefully, occasionally.

Speed limits constrain speed and seat belt constrain you in your seated position inside the vehicle at all times, but particularly during an accident or collision.

Underage regulations and or rules, constrain the imbibition of alcohol or restrict underage sex. I hope that I've explained constraint well enough for a puffed popinjay or even a genius like yourself?

Take care and stay safe.
Alan B.

Alan,

You have a lot in common with poor old Attenborough. I won't ask what you are on about because I know that you don't know.

Prof Peter Curson is an retired academic, but his last statement says it all and we continue to ignore old wisdom....

""Writing in 1899 he said – “the brilliancy of modern discoveries blinds incautious eyes to old truths and often endangers sound practice”"

This is a small crisis in global history terms... its only extreme due to media inflation!