There seems to be a concern about whether the public appreciation of science has eroded to a point where it has removed science from public debate and public decision making. Whether the public has come to regard evidence as optional.

Every citizen, scientists included, has some obligation to be involved in public affairs and politics.

The concern now is whether policymakers even understand the meaning of evidence. Whether there is any truth to this descriptor of "fact-free era." Whether policy is going to be made more and more in the absence of scientific input.

Congress, even with its frustrations, is the greatest instrument for justice and human welfare in the world.

One must not politicize science. But the converse is not necessarily true. There's no reason why scientists can not go into the public sphere. In fact, I would argue they should.

The level of concern and anxiety among scientists - and I guess I'd say the science-friendly public - about the place of science in society in government, has gone beyond concern to anxiety.

There is a sense that science and politics are incompatible. I don't think so at all. I think it's important that scientists take great pains to make sure that ideology and personal bias and wishful thinking do not contaminate the collection and analysis and evidence.