No use in arguing with this man. He's obviously ignorant. And also a liar. Marijuana is NOT physically addicting. And half of the reason it causes kids to lose ambition is because of its illegality. However, ambition is only the word used to describe the road to what americans call success in this country. Plenty of opportunity here, yet all people have a mind of their own and can live the life they choose. Different people have different beliefs...just because one harmless substance changes an individuals beliefs to differ from the country's...it does not make it a substance that gives loss of ambition.