For tonight's Conversation With Great Minds - I'm joined by Dr. Ron Daniels - President of the Institute of the Black World - 21st Century. Dr. Daniels has had a wide ranging career in politics and activism - previously serving as the Executive Director of the Center for Constitutional Rights - the Executive Director of Rainbow / PUSH - and the Deputy Campaign manager for Jesse Jackson's 1988 presidential campaign. In 1992 - he ran for President himself as an independent candidate.

For tonight's Conversation With Great Minds Thom is joined by Dr. Trita Parsi - the Founder and President of the National Iranian American Council. Dr. Parsi is the recipient of the 2010 Grawemeyer Award for Ideas Improving World Order and is an expert on US-Iranian relations - Iranian foreign politics - and the geopolitics of the Middle East. He is also the author of numerous books - including his most recent - "A Single Roll of the Dice: Obama's Diplomacy with Iran" - a must read for anyone who wants to understand the complicated and confusing US - Iranian relationship.

Lester Brown, Earth Policy Institute & Dr. Brenda Ekwurzel, Union of Concerned Scientists, join Thom Hartmann. Lester Brown, Earth Policy Institute & Dr. Brenda Ekwurzel, Union of Concerned Scientists join Thom Hartmann. The warming of the climate is unequivocal. That's one of the major findings of a new report put out by the United Nation's International Panel on Climate Change. The report - released every six years - is the most comprehensive report on climate change and global warming. This year's report - worked on by over 800 authors from dozens of countries - won't be released in full until Monday - but the summary for policymakers was released earlier today - and it highlights the report's key findings. Among them - man-made climate change is near certain - and climate change is already effecting extreme and severe weather events across the globe.

Daniel Sheehan, The People's Advocate For tonight's Conversation With Great Minds - Thom is joined by constitutional trial attorney Daniel Sheehan. Daniel is one of the most influential public interest lawyers in the country and has worked on a number of cases - including the Pentagon Papers case and the Karen Silkwood case - that have changed the course of American history. In 1980 - he founded the Christic Institute - where he served as General Counsel and Chief Trial Attorney. Daniel has also served as Chief Trial Attorney for the Romero Institute and Chief Trial Counsel for the ACLU's Rocky Mountain States chapter. His new book - "The People's Advocate: The Life and Legal History of America's Most Fearless Public Interest Lawyer" - is a must read for anyone who wants to know the inside story of some of the most important trials of the past half century.

Alan Weisman, author Countdown: Our Last, Best Hope for a Future on Earth, the long awaited follow-up to his previous book "The World Without US" which also became a documentary for PBS' NOVA program.

Dr. Joe Romm, Climate Progress joins Thom Hartmann. Right now - we still have have a chance to save our planet from the greatest threat it's ever faced: climate change. But at what point will our efforts be in vain? At what point will climate change become permanent?

EXTORTION: How Politicians Extract Your Money, Buy Votes, and Line Their Own Pockets joins Thom Hartmann.