In 1986, Schultz recommended air strikes on Libya after a US soldier died in an attack on a Berlin nightclub.
He worked tirelessly in the 1980s to end the civil war in Lebanon, working to secure the withdrawal of Israeli forces from the country.
He was unsuccessful in bringing Israel and the Palestinian Liberation Organization (PLO) to the negotiating table, but he managed to legitimize Palestinians as people with a valid stake in determining their future.
Shultz's doctrine on terrorism was used by subsequent administrations, especially that of George W. Bush, during the invasion of Iraq. Shultz backed the invasion of Iraq, declaring the country to be a "rogue state."
He said that Saddam Hussein's overthrow was crucial "for the integrity of the international system and for the effort to deal effectively with terrorism."
Shultz played a key role in boosting president Reagan's trust towards Mikhail Gorbachev, the former leader of the Soviet Union. In 1987, Reagan and Gorbachev signed the landmark Intermediate-Range Nuclear Forces Treaty.
While he largely stayed out of politics after leaving the Reagan administration, he continued taking a keen interest in certain issues such as climate change.
On his 100th birthday in 2020, Shultz wrote an essay in which he called out the need for trust in the US, pointing out his dissatisfaction with ex-president Donald Trump. "Trust is the coin of the realm," he wrote.Dapatkan update berita pilihan dan breaking news setiap hari dari Kompas.com. Mari bergabung di Grup Telegram "Kompas.com News Update", caranya klik link https://t.me/kompascomupdate, kemudian join. Anda harus install aplikasi Telegram terlebih dulu di ponsel.