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When the proportion of total developmental time spent in a particular developmental stage does not change with temperature, an organism shows "rate isomorphy." This is the case only if the lower developmental threshold is the same for all developmental stages. In this study, the incidence of rate isomorphy in seven species of mites and 342 species from 11 insect orders (some represented by several populations) was determined. Whether a species shows rate isomorphy or not was determined over a range of temperatures where the relationship between the rate of development and temperature is linear. Proportion of total developmental time spent in a particular stage was plotted against temperature and the existence of rate isomorphy inferred from a zero change in proportion. Rate isomorphy was detected in 243 (57%) of 426 populations. In the rest of the cases, rate isomorphy was violated by deviations in the proportion of time spent in a stage by an average of 0.2% (range 4.5E-06% to 2.8%) at the mean of the range of temperatures of all the data sets (11 degrees C). The violations occurred most frequently at the extremes of the linear phase, which is attributed to methodical biases, mortality at low temperatures, or too coarse an estimate of developmental time at high temperatures. Similarly, a meta-analysis also revealed an overall prevalence of rate isomorphy. Consequently, in insect and mite species, all the developmental stages appear to have the same population-specific lower developmental threshold. The existence of rate isomorphy could be of great practical importance, for example, in the timing of life-history events and in determining preadult thermal requirements. There are also indications that it may act as a phylogenetic constraint.

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This article contributes to the development of state capitalism as a reflexively critical project focusing on the morphology of present-day capitalism, and particularly on the changing role of the state. We bring analytical clarity to state capitalism studies by offering a rigorous definition of its object of investigation, and by demonstrating how the category state capitalism can be productively construed as a means of problematising the current aggregate expansion of the state’s role as promoter, supervisor and owner of capital across the world economy. Noting some of the geographical shortcomings of the field, we outline an alternative research agenda ‘uneven and combined state capitalist development’ which aims at spatialising the study of state capitalism and revitalising systemic explanations of the phenomenon. Rather than the negation of an abstract model of free-market capitalism, or the rise of a nationally scaled variant of capitalism, we posit contemporary state capitalism as a global process of restructuring of the capitalist state (including in its liberal form) underpinned by secular transformations in the materiality of surplus-value production, such as the consolidation of new international divisions of labour driven by automation and labour-saving technologies. The political mediation of these transformations results in the combined expansion of state-capital hybrids and of muscular forms of statism, which develop in inter-referential and cumulative forms across territory, producing further state capitalist modalities. This is a particularly potent dynamic in contemporary state capitalism, and its tendency to develop in a spiral that both shapes and is shaped by world capitalist development.