Explore research monographs, classroom texts, and professional development titles.
Discover the real world of business for best practices and professional success.
Discover trustworthy and timely resources in American government, politics, history, public policy and current affairs.
Start your research with authoritative encyclopedias and handbooks in the social and behavioral sciences.
Watch cutting-edge streaming video that supports teaching, learning, and research at all levels.
Develop the vital skills necessary to succeed in your academic and professional careers.
Carl Sagan, born in Brooklyn, New York, was an American astronomer, astrophysicist, and exobi-ologist who wrote the introduction for the first edition of Stephen Hawking's A Brief History of Time, published in 1988. Around age 5 Sagan ...
Russell, Bertrand (1872–1970)
Saltationism and Gradualism
Have you created a personal profile? Login or create a profile so that
you can save clips, playlists and searches
We found other relevant content for you on other SAGE platforms.
Navigating away from this page will delete your results
Please save your results to "My Self-Assessments" in your profile before navigating away from this page.
Sign in to my profile
Sign up for a free trial and experience all SAGE Knowledge has to offer.
You must have a valid academic email address to sign up.
Get off-campus access