Why did not God destroy Satan promptly after he rebelled?

Why Has he Allowed Satan,and the Angels that follow him. To rule the earth for so long?

I'm a Serious Student of the bible ,if you are not, with all respect Please ,Get your 2 Points nicely,Star the Question and Boogy on. thank you
Update: Thank you For the Stars, It helps to get some Ggood Answers. Again thanK you
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