Background: The Mississippian culture was a mound-building Native American civilization archeologists date from approximately 800 CE to 1600 CE, varying regionally. It was composed of a series of urban settlements and satellite villages (suburbs) linked together by a loose trading network, the largest city being Cahokia, believed to be a major religious center. The civilization flourished from the southern shores of the Great Lakes at Western New York and Western Pennsylvania in what is now the Eastern Midwest, extending south-southwest into the lower Mississippi Valley and wrapping easterly around the southern foot of the Appalachians barrier range into what is now the Southeastern United States. The Mississippian way of life began to develop in the Mississippi River Valley (for which it is named).
Context: The Mississippi stage is usually divided into three or more chronological periods. Each period is an arbitrary historical distinction varying regionally. At a particular site, each period may be considered to begin earlier or later, depending on the speed of adoption or development of given Mississippian traits. The "Mississippi period" should not be confused with the "Mississippian culture". The Mississippi period is the chronological stage, while Mississippian culture refers to the cultural similarities that characterize this society.  The Early Mississippi period (c. 1000-1200 CE) had just transitioned from the Late Woodland period way of life (500-1000). Different groups abandoned tribal lifeways for increasing complexity, sedentism, centralization, and agriculture. Production of surplus corn and attractions of the regional chiefdoms led to rapid population concentrations in major centers.  The Middle Mississippi period (c. 1200-1400) is the apex of the Mississippi era. The expansion of the great metropolis and ceremonial complex at Cahokia (in present-day Illinois), the formation of other complex chiefdoms, and the spread and development of SECC art and symbolism are characteristic changes of this period. The Mississippian traits listed above came to be widespread throughout the region.  The Late Mississippi period (c. 1400-1540) is characterized by increasing warfare, political turmoil, and population movement. The population of Cahokia dispersed early in this period (1350-1400), perhaps migrating to other rising political centers. More defensive structures are often seen at sites, and sometimes a decline in mound-building and large scale, public ceremonialism. Although some areas continued an essentially Middle Mississippian culture until the first significant contact with Europeans, the population of most areas had dispersed or were experiencing severe social stress by 1500. Along with the contemporaneous Ancestral Pueblo peoples, these cultural collapses coincide with the global climate change of the Little Ice Age. Scholars theorize drought and the reduction of maize agriculture, together with possible deforestation and overhunting by the concentrated populations, forced them to move away from major sites. This period ended with European contact in the 16th century.
Question: transitioned to what?
Answer: transitioned from the Late Woodland period way of life (500-1000).

Background: Epstein was born to a secular Jewish family in New York City and raised in Brookline, Massachusetts. He attended Brookline High School (a 1991 graduate), and played baseball for the Brookline High School Warriors, but dreamed of working for the Red Sox. Epstein attended Yale University where he lived at Jonathan Edwards College. He served as sports editor of the Yale Daily News.
Context: After leaving the position as the Padres' President, Lucchino became president and chief executive officer (CEO) of the Red Sox on November 15, 2001 and hired Epstein to work under him. At the end of the 2002 season, Lucchino appointed Epstein to replace interim general manager (GM) Mike Port. Epstein is credited with initiating the trade of Nomar Garciaparra and making key contract acquisitions including those of Kevin Millar and Curt Schilling during his first tenure as Red Sox GM. The new players were regarded as instrumental in breaking the so-called "Curse of the Bambino" when the Red Sox defeated the St. Louis Cardinals in the 2004 World Series. It was the Red Sox' first World Series championship since 1918, ending what remains the third longest championship drought in the history of any Major League team, after the Chicago White Sox (1917-2005) and the Chicago Cubs (1908-2016).  On October 31, 2005, Epstein resigned, rejecting a three-year, $1.5-million-per-year contract for personal reasons. According to The Boston Globe, "This is a job you have to give your whole heart and soul to", he said. "In the end, after a long period of reflection about myself and the program, I decided I could no longer put my whole heart and soul into it." Because it was Halloween the night he resigned from the Red Sox, Epstein left Fenway Park wearing a gorilla suit in an attempt to avoid reporters. A witness reported spotting a person wearing a gorilla suit driving a Volvo similar to Epstein's that night. The suit was loaned to him and was later auctioned for $11,000. The money raised was given to The Jimmy Fund and the Foundation to be Named Later (FTBNL).  Epstein remained in contact with the team's front office and on January 12, 2006, he and Red Sox management announced his return. Six days later, the team announced that he would resume the title of general manager and add the title of executive vice president. In November 2007, Epstein announced, at the annual general manager meeting, that he had signed a new contract with the Red Sox but declined to disclose the terms of the deal.  In December 2007, Epstein was mentioned in the Mitchell Report regarding a November 2006 email exchange he had had with Red Sox scout Marc DelPiano on the possible acquisition of closer Eric Gagne. In the email, Epstein asked DelPiano, "Have you done any digging on Gagne? I know the Dodgers think he was a steroid guy. Maybe so. What do you hear on his medical?" DelPiano replied that "steroids IS the issue" with Gagne, questioned his "poise and commitment" and expressed questions about his durability "without steroid help." Despite DelPiano's reservations about Gagne, Epstein traded Kason Gabbard and minor league outfielders David Murphy and Engel Beltre to the Texas Rangers for Gagne on July 31, 2007.
Question: What year did he become president?
Answer:
November 15, 2001 and hired Epstein to work under him.