There is an "emerging consensus" on key issues such as climate change and poverty, UK Prime Minister Tony Blair has told the World Economic Forum.
Mr Blair was the big draw for Davos participants on Wednesday
His comments came in the keynote speech on the first day of the Davos meeting of business and political leaders.
Mr Blair used his speech to stress the themes he wants to highlight during the UK's chairmanship of the G7 group of industrialised countries this year.
Also on Davos' agenda were Aids and dangers facing the world economy.
Mr Blair told a packed conference hall that efforts to deal with global warming would not mean "drastic" cuts in living standards.
But, in what correspondents said was a cautious speech, he warned the efforts would fail if they demanded actions that seriously threatened economic growth.
Mr Blair also noted that the evidence for global warming was "disputed", an acknowledgement of the US refusal to sign up to the Kyoto climate change deal.
He praised US President George W Bush's recent inauguration speech for showing a "consistent evolution in US policy" by stressing freedom.
"Freedom is good in itself, but it is also the best guarantee that human beings will live in sympathy with each other," he said.
Other issues on which Mr Blair saw consensus emerging included terrorism, the need to spread democracy, the Middle East peace process and the agenda for Africa.
Earlier on the first day, the conference had focused on Aids, with an update on efforts to get drugs to Aids sufferers warning of a $2bn shortfall in funding.
The World Health Organisation (WHO) is aiming to have three million people on anti-Aids drugs by the end of 2005.
More than 700,000 people in poor countries were now on life-extending drugs, the WHO said, up from 440,000 six months earlier.
Security is tight, and temperatures well below freezing
French President Jacques Chirac used a speech given over a video link to call for an international tax to fund the fight against Aids.
"It would allow us to mobilise $10bn a year," he said.
His proposal mooted either a levy on fuel for air and sea transport, a $1 tax on air tickets, or a tax on international financial transactions.
By the numbers
On the conference floor, the forum is usually dominated by business issues - from outsourcing to corporate leadership - with bosses of more than a fifth of the world's 500 largest companies scheduled to attend.
Economics remains the focus, and several economists took the opportunity to warn that imbalances threatened global stability.
The deficit both in the public purse and the overall economy in the US was a particular danger, said Jacob Frenkel, former Israeli central banker and current vice-chairman of insurer American International Group (AIG).
Call for action
But the political side of Davos continues to grab the headlines.
Other issues to be discussed at the five-day conference range from China's economic power to Iraq's future after this Sunday's elections.
More than 20 other world leaders are expected to attend.
The Forum halls are thronged with networkers
They include Ukraine's new president, Viktor Yushchenko, as well as newly-elected Palestinian leader Mahmoud Abbas and South African President Thabo Mbeki.
Showbiz figures will also put in an appearance, from U2 frontman Bono - a well-known campaigner on trade and development issues - to Angelina Jolie, a goodwill campaigner for the UN on refugees.
At the same time, about 100,000 people are expected to converge on the Brazilian resort of Porto Alegre for the World Social Forum - the so-called "anti-Davos" for campaigners against globalisation, for fair trade, and many other causes.