What causes autism? As far as we know in 2013, there is no single gene or single environmental factor that accounts for the more than 1 million Americans with ASDs.
My research shows that uncertainty about your income at older ages causes more depression, causes more anxiety, which could lead to more chronic heart failure, heart disease, does actually mean shorter lifespans.
Advertising has done more to cause the social unrest of the 20th century than any other single factor.
More has been screwed up on the battlefield and misunderstood in the Pentagon because of a lack of understanding of the English language than any other single factor.
No one will deny that the excessive use of alcohol and alcoholic beverages would do more than any other single factor to make impossible a total war effort.
Galileo, perhaps more than any other single person, was responsible for the birth of modern science.
Fluoride causes more human cancer, and causes it faster, than any other chemical.
The general uncertainty about the prospects of medical treatment is socially handled by rigid entry requirements. These are designed to reduce the uncertainty in the mind of the consumer as to the quality insofar as this is possible. I think this explanation, which is perhaps the naive one, is much more tenable than any idea of a monopoly seeking to increase incomes.
Always leave enough time in your life to do something that makes you happy, satisfied, even joyous. That has more of an effect on economic well-being than any other single factor.
Humanity has made a great error in seizing on a certain moment, no more intrinsically notable than any other moment and has called it Birth. The habit of honoring one single instant of the universal process to the disadvantage of other instants has done more, perhaps, than anything to obfuscate the crystal clearness of the fundamental flux.
There's no point bleating about the future of pandas, polar bears and tigers when we're not addressing the one single factor putting more pressure on the eco system than any other - namely the ever-increasing population.
The meaning ascribed in popular usage to the word 'selfishness' is not merely wrong: it represents a devastating intellectual 'package-deal,' which is responsible, more than any other single factor, for the arrested moral development of mankind.
Your ability to discipline yourself to set clear goals, and then to work toward them every day, will do more to guarantee your success than any other single factor.
It is my conviction that there is perhaps no single factor more important in a spiritual home and in building spiritual strength in our children than the teaching and practice of prayer.
I am perhaps more proud of having helped to redeem the character of the cave-man than of any other single achievement of mine in the field of anthropology.
It is not change that causes anxiety; it is the feeling that we are without defenses in the presence of what we see as danger that causes anxiety.