Proactive, Reactive and Organizational behavior

Proactivity
“In organizational behavior and industrial/organizational psychology, proactivity or proactive behavior by individuals refers to anticipatory, change-oriented and self-initiated behavior in situations, particularly in the workplace[citation needed]. Proactive behavior involves acting in advance of a future situation, rather than just reacting. It means taking control and making things happen rather than just adjusting to a situation or waiting for something to happen. Proactive employees generally do not need to be asked to act, nor do they require detailed instructions.”
https://en.wikipedia.org/wiki/Proactivity

Organizational behavior
“Organizational Behavior (OB) or Organisational behaviour is “the study of human behavior in organizational settings, the interface between human behavior and the organization, and the organization itself.” [1]

OB can be divided into three levels.[2] The study of :

individuals in organizations (micro-level),
work groups (meso-level),
how organizations behave (macro-level).

Contributing disciplines: Psychology, Social Psychology, Sociology, Anthropology, Political Sciences, Economics”
https://en.wikipedia.org/wiki/Organizational_behavior
Difference Between a Proactive & a Reactive Business Strategy
“Reactive business strategies are those that respond to some unanticipated event only after it occurs, while proactive strategies are designed to anticipate possible challenges. Because no one can anticipate every possibility, no organization can be proactive in every situation. However, businesses that emphasize proactive strategy are usually more effective at dealing with challenges.”
http://smallbusiness.chron.com/difference-between-proactive-reactive-business-strategy-62157.html
Proactive Vs. Reactive Approaches To Your Business And Talent
“Have you thought about how much it costs to fix a problem after the fact vs. preventing it from happening in the first place?”
http://www.eremedia.com/ere/proactive-vs-reactive-approaches-to-your-business-and-talent/

Difference Between a Proactive & a Reactive Business Strategy
“Reactive strategies usually are more conservative because you wait for external influences before taking action. This can protect against wasted investments or unnecessary moves that damage current success. However, companies that rely too much on reactive strategies may miss new or emerging business opportunities. In extreme cases, companies react too slowly to industry or market evolution and succumb to more aggressive competitors with advanced offerings.”
http://yourbusiness.azcentral.com/difference-between-proactive-reactive-business-strategy-13780.html