These naturally included the police, the army and the news media, but also the more intangible force of Milosevic's "authority".
After practicing medicine more than 50 years, it is obvious the strength of libido and the level of need are enormously variable, more complicated when you factor in the intangible force of physical attraction.
But to blame the intangible forces of diversity targets, especially when nearly all industries and professions in the UK are woefully poor on setting them and meeting them, is really quite desperate.
In this spirit, she grounds the often-intangible forces of neoliberalism and corporate capitalism in the place-specific voices, encounters, and built fabric of one changing city.
While the central concept of the project could be defined as the capture, manipulation, and visualization of electromagnetic fields, the Quebec artist even translates some of these intangible forces into an experimental soundtrack that runs alongside its stunning interplay of light and shadow.
By about the middle of the 19th century, however, several simple organic compounds had been produced by the reaction of purely inorganic materials, and the unique character of organic compounds was recognized as the consequence of an intricate molecular architecture rather than of an intangible vital force.
This intangible force that has made Europe such a magnet for the rest of the world over the past two centuries is, to put it simply, modernity.
NPR's Invisibilia is a podcast delving into the intangible forces that shape behaviour.
What is the intangible force that caused this enterprise become a startup?
Perhaps the most important is an intangible one: that of reputation.
Globalization has a tendency to make people feel acted-upon by distant, intangible forces.
