Who is Henry Kissinger?

As the title says, who is Henry Kissinger?

I read this from Wikipedia:

"Kissinger pioneered the policy of détente with the Soviet Union, orchestrated an opening of relations with China, engaged in what became known as shuttle diplomacy in the Middle East to end the Yom Kippur War, and negotiated the Paris Peace Accords, which ended American involvement in the Vietnam War. He has also been associated with controversial policies, such as the U.S. bombing of Cambodia during the Vietnam War, U.S. involvement in the 1973 Chilean military coup, a "green light" to Argentina's military junta for their Dirty War, and U.S. support for Pakistan during the Bangladesh Liberation War despite a genocide being perpetrated by Pakistan."

It sounds like he was a bad guy, but I know there's more to the story than that with the collective hate I see for him here on Lemmy.