Final answer:
Lyndon B. Johnson was the president who launched the Great Society domestically and escalated the Vietnam War abroad.
Step-by-step explanation:
As president, Lyndon B. Johnson launched the "Great Society" at home while escalating the Vietnam War abroad. The Great Society was a set of domestic programs designed by President Johnson with the intention of eradicating poverty and racial injustice, investing in education, and supporting the arts. Despite these significant domestic achievements, Johnson's administration was also marked by an increasing involvement in the Vietnam War, a policy that had been initiated by his predecessors. His commitment to the war limited the resources available for the Great Society programs and led to growing discontent among the American people. This escalated military engagement and its effect on domestic policy turned out to be controversial elements of his presidency.