Romeo thought that Juliet was dead, and he didn't want to live.
the pill was poisonous
An infinitive is the infinitive form of the verb that is being formed with "to" plus the base form of the verb. It can be used either as a noun, adjective or as an adverb. ... This infinitive functions in the sentence as an adverb, modifying the verb "create".
He gives a reason for this that from innocence the forefathers "grew" their safety rather than by "power and genius" perhaps meaning that having a good heart and meaning well for other people results in more "safety" in life than "power and genius" which brings to mind the demise of Conrad Black who sought Power and Genius I would say (perhaps as an addiction to power) that it led him to break the law and end up in jail.