reasons for detente (day-taunt)
europe
russia
usa
security of borders due to international affirmation of post-war european borders
national security due to post-war affirmation of european borders
economic challenges brought by the expenses of nuclear weapons
a reason to end the Vietnam War due to the mass casualties and economic challenges, as well as internal opposition
economic challenges brought by the expenses of nuclear weapons
China
China wanted better relations with the US to gain leverage over the USSR
Western technology + resources
To regain Taiwan
rebuild relationship with China after Sino-Soviet split as a partnering communist country
build relationship with China to bring them into the international diplomatic landscape as leverage
demonstrate civil foreign policy
ensure eastern countries follow their human rights standards
worried about their own safety due to the nuclear war
minimise further damage after post-war casualties, furthered by their citizens' recent memories of a terrible war
willy brandt was a key supporter of better soviet relations with the west and for a better developed relationship between East and West Germany