It is not easy to understand the history and origin of the different peoples of today's world inasmuch as scientific data are partial and seemingly contradictory. These roughly fall into three categories:-prehistoric data are remains of cultures and human skeletons. They allow us to affirm that such and such a region was inhabited in such and such an epoch. Their absence, however, means nothing, and they hardly permit the attribution of a biological origin to the peoples of the past because (...) of the rapid evolution of the forms and dimensions of the skeletons during the course of time;-present genetic data give an interesting picture of the biological relationship of peoples and of the way they diverged throughout history. Their interpretation is delicate, however, especially when it concerns small populations;-“biometric” data involve the measurement of pigmentation, dimensions and proportions of the body and organs. They are susceptible to very rapid variations during the course of history and mainly give an indication of the adaptation of the people to a certain kind of environment: tropical, temperate, cold or arctic, plain or altitude, forest, savannah, prairie, steppe or desert. (shrink)

A similarity index allowing comparisons of human populations has been defined as the common “Percentage of Isoactive Genes” or PIG, which can be calculated from any gene frequency distribution characterizing two populations. The complement to one of this value has been proved to be a distance, a measure which can be used in most techniques of cluster analysis as well as in usual representations of multivariated data (dendrograms, etc...). Furthermore, the formula can be generalized to a set of populations. From (...) a biological point of vue, PIG values are particularly meaningful, whereas other previously defined indices which tend to measure similarity or difference between populations neither have such an advantage, nor can they be expressed by a single and clear number like a percentage. Moreover,comparisons using PIG indices depend at first on the fluctuations of the most frequent genes of a distribution; on the other hand, different measures principally reflect the variations of low frequency genes, which unfortunately are nearly always poorly estimated, due to weak samples of populations.Interestingly, PIG values can be applied to any frequency distribution of any kind of objects. They can also extend to a whole set of distributions by using a mean value. When applying these measures to a series of polymorphic genetical systems such as ABO, Rhesus, MNSs, Gm and HLA, one can account for the variability or the homogeneity particular to the different human groups, with simple and objective criteria. (shrink)

Tout en évitant la forme érudite, «Roseau pensant» évoque le genre de méditation que l'on rencontre chez S. Augustin,... Pascal (à qui l'on doit l'expression), et chez d'autres penseurs qui ont écrit ce qu'on appelle quelquefois un «Journal». Ici: méditations sur la vie intérieure, sur le sens de l'existence en rapport avec Dieu et le monde, genre philosophique où non seulement l'auteur confronte sa pensée à la pensée d'autrui, mais la soumet à l'expérience qu'il a faite de la vie au (...) cours d'une carrière de savant, de philosophe et de grand voyageur. (shrink)

If we return to the experiences of our youth, we perceive what had the power to awaken our curiosity and ambitions*. The non-conformism of the Surrealists was fostered by Romantic sources and every conceivable symbolism; even if in a roundabout manner, it was through them that the names of Klee and Kandinsky were first heard. The world of the marvellous, the only one decreed worthy of attention, opened out onto painting. The moderns of the group: Dali, Tanguy, Masson, received first (...) prize for poetic adventure, but they harked back to certain selected precursors—rightly or wrongly—for the same gifts that they had themselves: Uccello, Bosch, Dürer, Blake, and Gustave Moreau. And indeed, by retaining only the unexpected, the fantastic, and (often indulgently) the scandalous, a taste was maintained for emotional shock and association, as exemplified by the sustained style of André Breton, and the more supple prose of Aragon. (shrink)

En publiant les Principes de la philosophie du droit, Hegel ambitionnait de constituer la Science de l'Etat, et cela a l'encontre aussi bien de toute conception utopique que de toute interpretation partisane. Il disposait a cet effet des ressources theoriques presentees quelques annees auparavant dans la Science de la logique. Ce commentaire privilegie incontestablement l'aspect logique et processuel du propos hegelien. Il s'agit donc non seulement de reperer la presence de ces schemes logiques mais d'en eprouver la validite et d'en (...) verifier l'efficacite. Ce parcours logique ne fait appel qu'a l'energie et au dynamisme du pur penser - sans apport etranger, exterieur ou empirique - et a sa seule fecondite interne susceptible d'engendrer par elle-meme, de maniere immanente, la richesse et la totalite du sens. (shrink)

Plutôt qu’un quatrième pouvoir, les médias constituent un contre-pouvoir à l’ensemble des acteurs sociaux, État inclus. Les relations entre eux sont donc naturellement tendues. Cela n’empêche pas l’État de confier des missions de quasi-« service public » à des instances privées dont il détermine les rôles sans in­ter­venir pour autant dans leur mise en œuvre. En Belgique francophone, c’est le cas du Conseil de déontologie journalistique, initiative d’autorégulation des médias, dont les activités s’articulent à celles du législatif, de l’exécutif et (...) du judi­ciaire. Cette complémentarité constitue non seulement la concrétisation d’un prin­cipe de philosophie politique, la subsidiarité, mais elle est aussi une garantie du respect de l’indépendance de ce contre-pouvoir. (shrink)