Jackson Pollock (January 28, 1912 – August 11, 1956) was an influential American painter and a major figure in the abstract expressionist movement.
http://en.wikipedia.org/wiki/Jackson_Pollock
Pollock's most famous paintings were made during the "drip period" between 1947 and 1950
His compositional innovation that always intrigued was his “All-over” style of painting.
“It is a style of painting which avoids any points of emphasis or identifiable parts within the whole canvas and therefore abandons the traditional idea of composition in terms of relations among parts.”
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