"We live in a culture in which intelligence is denied relevance altogether, in a search for radical innocence, or is defended as an instrument of authority and repression. In my view, the only intelligence worth defending is critical, dialectical, skeptical, desimplifying."

Author and entrepreneur Andrew Keen recently visited Big Think to discuss his new book "The Internet is Not the Answer," which explores the negative effects of Silicon Valley innovations on society.

"I don't think necessity is the mother of invention — invention, in my opinion, arises directly from idleness, possibly also from laziness. To save oneself trouble."

In today's featured discussion on pheromones, biologist Edward O. Wilson explains that there are massive amounts of natural stimuli that humans are not physically privy to.

"I am of the firm belief that everybody could write books and I never understand why they don't. After all, everyone speaks. Once the grammar has been learnt it is simply talking on paper and in time learning what not to say."

"World peace, like community peace, does not require that each man love his neighbor—it requires only that they live together in mutual tolerance, submitting their disputes to a just and peaceful settlement."

One of the world's foremost psychiatrists specializing in PTSD recently visited Big Think to discuss the diagnosis and treatment of traumatic disorders.