“When a place gets crowded enough to require ID's, social collapse is not far away. It is time to go elsewhere. The best thing about space travel is that it made it possible to go elsewhere.”
Other Robert A. Heinlein Quotes
For me, politeness is a sine qua non of civilization.
Robert A. Heinlein 
62% of people like this quote
Be wary of strong drink. It can make you shoot at tax collectors... and miss.
Robert A. Heinlein
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Anyone who considers protocol unimportant has never dealt with a cat.
Robert A. Heinlein
56% of people like this quote
No statement should be believed because it is made by an authority.
Robert A. Heinlein
56% of people like this quote