robert zoellick has advice. 6 u.s. presidents was deputy secretary of state for president bush and is a former president of the world bank. he just published america in the world,, a history of u.s., diplomacy, and foreign policy, a very deep dive into the people in factors that shaped america's foreign policy. since the founding of the country, ambassador's alex, thank you so much for joining us today. as i read your book, it's a fascinating collection of consequential personalities in u.s. foreign policy and inflection points. whether it was bad of our bush in looking at a moment on how technology needed to be woven into a national security or kordell hold taking and expanding your policy to look about america's trade position in the world. and i'm interested in what your insights are on people and moments that matter, and whether we're at one of those inflection points today as we move from trump to biden. it's been a momentous, 4 years, trying to fix breaking things. it was delighted to disrupt the international sy