It's not difficult to argue that blogging has done more to spread knowledge and ideas than any other publishing innovation since the printing press. Here's a look at the most popular blogging platforms to help you get your ideas out there. Printer and photocopier salesmen of the late 20th century frequently peddled their wares with the pitch that a personal printing device could turn anyone—schools, neighborhood associations, churches, individuals with a message to get out—into small time publishers. The revolution they hinted at didn't come about on their watch, however. The personal printer simply didn't have the volume and the reach that a later innovation, the internet—and more specifically, blogging—would have. Blogs give anyone an inexpensive platform to promote their ideas to a potential audience of the entire world, not just a county in Idaho or a street corner in Manhattan.