Who are some decent to good writers on specific issues?
Criminology: Lawrence Sherman
Secession and free riding: Mancur Olson, Christopher Heath Wellman, Jonathan Rauch (Demosclerosis only)
Taxes: Robert McIntyre, Martin Gross, Jerry Mashaw, Joel Slemrod, Michael Graetz
Machiavellianism: Craig Unger, Robert Cialdini
Corruption: Gilens and Page, Bill Black
Environment: Richard C. Porter, Bjorn Lomborg, Lester Brown
Media and consumerism: Dean Baker, Robert McChesney, Marie Winn, Jackson Lears, Neil Postman, James Howard Kuntsler
Macroeconomic modeling: L. Randall Wray, Joe Firestone, Paul Krugman, Steve Keen
Democracy: Douglas J Amy, Tatu Vanhanan, Bruce Ackerman
War and Trade: Alexander B. Downes, NerveAgent, Donald Knox, George Kennan, Eamon Fingleton, Joseph Springer, James Dunnigan, Terry Crowdy
Existances: Scott D. Sagan, Nick Bostrom, Bruce G Blair, Martin Rees, Laurie Garrett
General economics: Timothy Taylor, Lawrence Mishel, Robert Frank, Nick Rowe, Edmund Phelps
Biocultural issues: JP Rushton, Byron Roth, John Glad, Thomas Jackson, James
Kirkpatrick, Charles Wood, Peter Frost, Soeren Kern, Steve Sailer, Heather MacDonald, Gregory Hood, Howard Kahane, Napoleon Chagnon, Bruce Bawer, Helmuth Nyborg, Greg Johnson, Glen Roberts, Ed Rubenstein, Fjordman, Jared Taylor, Jim Goad, Chuck at Humanvarieties.org
Finance: Michael Hudson, Yves Smith, Willem Buiter, Martin Wolf
Education and Psychology: Judith Rich Harris, James Thompson, Linda Gottfredson, Doug Lemov, John Gottman, Judith Lanier, Jeanne Chall, Robert A. Bjork, David Myers, Heather C. Hill, Deborah Loewenberg Ball
Note that some fields have much better thinkers than others.
Also note that many thinkers do abysmal work outside their area of expertise. For example, Paul Krugman provides hundreds of accurate stats against austerity, but throws out thousands of unsupported opinions on ethnoracial issues and other political issues.