There are different types of PACs. I forget the exact names, but some are directly attached to organizations, and can only solicit from org people like employees, directors, board members, etc., and some PACs are not affiliated with an org and can solicit from anybody. Emily&#x27;s List is a famous pro-choice PAC that is not affiliated with any other organization.<p>As for why PACs exist--they exist for the reason any other organization exists. People can have a greater social impact if they pool their resources, than if they act individually. This is the fundamental basis for nonprofits, corporations, partnerhips, newspapers, churchs, clubs, etc... basically any collection of people brought together by a mission.<p>The specific thing that ONLY a PAC can do is give money directly to candidates. No other type of organization can give money to political candidates.