Do either causes, or effects, not
both.
Classify causes and
discuss them in increasing
order of importance, or use a causal chain, going from the immediate cause to the
more remote cause.
Example: There are many causes of X, but the three
most important
are A, B, and C.
The first major cause of X is
A.
A second major cause of X is
B.
The most important cause of X is
C.