Where can i find a brief description of several major Europeans, including Lenin, trotsky, sorel, etc.
For Internet searching:
http://hanlib.sou.edu/searchtools/
At this webpage, you can go immediately to the search sites (first three columns across the top) -- or even better you can scroll down until you see the section called HOW TO SEARCH THE INTERNET. Those are the links to start with. You'll not only learn how to come up with good search terms, but also how to evaluate the webpages you get as results. Some will be good and others will be garbage. You need to know how to tell the difference.
My favorite way to search is to go to Google's advanced search page http://www.google.com/advanced_search?hl=en and put my search words or phrases into the first or second search box (either "all the words" or "exact phrase"). Another is to start out at http://scholar.google.com. However, there many other strategies for searching you can use, and the HOW TO SEARCH THE INTERNET section at http://hanlib.sou.edu/searchtools/ will help you best.
Learning to use Google or other search engines can save you time and help you learn to find information efficiently.