Instead of starting a new nuclear arms race now is the time to reclaim our Nation's position of leadership on nuclear nonproliferation efforts.

There is no international problem that can be addressed or solved without the engagement and leadership of the United States and everybody in the world knows that its just fact of life. So sometimes I think we could conduct ourselves with a little more humility.

In this nation leadership is dollars.

I think most Americans understand that we went through a period in which American leadership was judged quite critically internationally.

We're in a leadership position in sports. People look up to the National Football League.

Half a world away nations that once lived under oppression and tyranny are now budding democracies due in large part to America 's leadership and the sacrifices of our military.

Obama is thoroughly mixed up with all these things he's got. He's got to solve Libya. He's got to solve Afghanistan. He's everywhere. And this nation I don't know why it's not showing the leadership and capacity to attend different issues at the same time.

Each one of us and indeed all those who aspire to national leadership must bring their own visions views and styles to the business of reforming Nigeria and the search for solutions.

The person who takes the oath of office in the next four months will shape not just the next four years but the next forty years of our nation. In these next four years we need proven leadership proven judgment and proven values. America needs four more years of President Barack Obama.

We must recognize that as the dominant power in the world we have a special responsibility. In addition to protecting our national interests we must take the leadership in protecting the common interests of humanity.

Where there is an absence of international political leadership civil society should step in to fill the gap providing the energy and vision needed to move the world in a new and better direction.

The more that social democracy develops grows and becomes stronger the more the enlightened masses of workers will take their own destinies the leadership of their movement and the determination of its direction into their own hands.

Ever since Israel has been a nation the United States has provided the leadership. Every president down to the ages has done this in a fairly balanced way including George Bush senior Gerald Ford and others including myself and Bill Clinton.

Leadership is a potent combination of strategy and character. But if you must be without one be without the strategy.

Henceforth the leaves of the tree of knowledge were for women and for the healing of the nations.

And indeed this theme has been at the centre of all my research since 1943 both because of its intrinsic fascination and my conviction that a knowledge of sequences could contribute much to our understanding of living matter.

The increased global linkages promote economic growth in the world through two key mechanisms: the division of labor and the international spillovers of knowledge.