Complex sentence: Anti-corporate activists (see activism) believe that the rise of large business corporations is posing a threat to the legitimate authority of the public good.These activists believe corporations are manipulating politics and governments; invading people's privacy; and creating false needs in consumers.
Split into simpler sentences: Anti-corporate activists (see activism) believe that the rise of large business corporations is posing a threat to the legitimate authority of the public good. These corporations, they believe, are invading people's privacy, manipulating politics and governments, and creating false needs in consumers.