adventurism

/ədˈvɛntʃəˌrɪzəm/
/ædˈvɛntʃəˌrɪzəm/

noun

The willingness to take risks in business or politics (especially in the context of foreign policy); actions, tactics, or attitudes regarded as daring or reckless.

Only in this manner can we hope to reduce the risks of adventurism and miscalculation in a world that retains many thousands of nuclear weapons.