And nonprofit groups market what they do, be it medical research or political actions, when they solicit contributions of time and money or try to influence people's behavior.

Their responsibility and authority range from occasional contributions in surveys and focus groups to full project sponsorship, which includes providing financial and political support.

However, when elaborating his political theory, the art and thought of his writing show his incomparable contributions, but at the same time his disadvantages can't be neglected.