In many cases, any of the four main theories can be applied at either the macro or micro levels.There are really two distinct types of theories: first, Grand Theories are theories which deal with the universal aspects of social processes or problems and is based on abstract ideas and concepts rather than on case specific evidence.

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When theories are used at this level they are referred to as Macro Theories.

Macro theories are theories which best fit the study of massive numbers of people (typically Conflict and Functional theories).

Once the study is administered the findings and generalizations can be considered to see if they support the theory.

If they do, similar studies will be performed to repeat and fine-tune the process.

These were simply put, that all elderly people realize the inevitability of death and begin to systematically disengage from their previous youthful roles while at the same time society prepares to disengage from them (see Maddox et al. Findings and generalization consistently yielded a "no" in terms of support for this theory.

For all intents and purposes this theory was abandoned and is only used in references such as these (for a more scientifically supported theory on aging Google "Activity Theory and/or Continuity Theory").

(see American Sociology Association, Theory SOURCE ). This theory was founded by a German philosopher, economist, sociologist, and revolutionary (1818-1883).

Marx was a witness to oppression perpetrated by society’s elite members against the masses of poor.

He had very little patience for the capitalistic ideals that undergirded these powerful acts of inhumane exploitation of the average person. Later another German named Max Weber (1864-1920; pronounced "Veybur") further developed this sociological theory and refined it to a more moderate position.

Weber studied capitalism further but argued against Marx’s outright rejection of it.

Without theories, science would be a futile exercise in statistics.