Can female budgies lay eggs without a male budgie present?

Yes they can. A female budgie can lay eggs with out a male budgie the only difference is they won't be fertile. Now most females won't lay eggs on their own but some do.

I would try to staying away from giving the female a nest box or an empty food dish. Taking these steps will prohibit breeding behavior. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.